Thestandard feature analysis toolsin ArcGIS Enterprise (e.g., buffer, overlay, aggregate points) require hosted feature layers, which depend on therelational data store(a component of ArcGIS Data Store). The relational data store is the default location for hosting feature layers.
From ArcGIS Enterprise documentation:
"To use the standard spatial analysis tools and create hosted feature layers, the ArcGIS Data Store (relational) must be configured and set as the default hosting location."
* OptionA(spatiotemporal big data store) is used forreal-time and big data feeds, not standard analysis.
* OptionCsupportscached tiles, not feature layers.
Reference:ArcGIS Enterprise -Configuring the Relational Data Store for Hosting Feature Layers

Registering the database as a data store item in the ArcGIS Enterprise portal allows administrators to control who can publish services referencing the data. By sharing the data store item with specific groups or individuals, administrators can restrict publishing capabilities to authorized users. At the same time, all users can be granted appropriate permissions to access and edit the data directly in the user-managed database, independent of the publishing privileges.
Registering the database as an ArcGIS-managed data store in Server Manager does not provide the same level of control over publishing permissions. Registering it as a relational data store in ArcGIS Data Store is intended for managed data storage and does not apply to user-managed databases.
Reference Source:ArcGIS Enterprise documentation on registering user-managed data stores and controlling access.

In ArcGIS Enterprise, theCreatoruser type includes full privileges for content creation, sharing, and administration. When paired with thePublisherrole, it grants the user the ability to publish hosted feature layers, map image layers, and other services, as well as perform editing tasks on existing data. This combination is specifically designed for users who require both publishing and editing capabilities.
TheEditoruser type is limited to editing and cannot publish content. TheGIS Professionaluser type provides access to ArcGIS Pro but, when assigned theData Editorrole, restricts the user from publishing content.
Therefore, only theCreator user type with Publisher rolesupports both publishing and editing workflows.
Reference Source:ArcGIS Enterprise Administrator Guide - User types and roles

By default,feature services limit the number of records returned in a single request(usually set to 1,000).
To allow all 2,400 features to be returned in one call, the administrator needs toincrease the "Maximum number of records returned by the server"(maxRecordCount) setting during or after publishing.
From the ArcGIS Server documentation:
"The maxRecordCount property defines the number of records returned by the server in a single request. To return all features, this value must be increased accordingly."
* OptionA(adjust pooling) relates to concurrency and scalability, not data retrieval limits.
* OptionCwould keep the default setting of 1,000, whichwould not meet the requirement.
* OptionDrelates to visual performance, not record retrieval.
Reference:ArcGIS Server -Feature Service Settings and Tuning for Performance

Portal for ArcGIS provides built-in usage reports that allow administrators to monitor how members are using, sharing, and contributing resources. These reports offer insights into content creation, usage patterns, and group activities. Administrators can generate and export these reports in tabular formats for further analysis.
ArcGIS Server statistics focus on service-level metrics and do not provide detailed user or group content statistics. ArcGIS Monitor captures system performance metrics but is not designed for detailed content usage analysis by users or groups.
Reference Source:ArcGIS Enterprise documentation on usage reports in Portal for ArcGIS.