Explanation
The mass transfer tool allows you to transfer up to 250 records at a time from one user to another user while keeping the existing team members intact. You can access this tool from Setup by entering Mass Transfer Records in the Quick Find box. References:
https://help.salesforce.com/s/articleView?id=sf.mass_transfer_overview.htm&type=5

Explanation
To enable record sharing and collaboration with groups, you need to add the groups related list to the object layouts and configure the Add Record action in the group publisher.
References: https://help.salesforce.com/s/articleView?id=sf.collab_groups_records.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.collab_groups_record_actions.htm&type=5

Explanation
To acknowledge cases with a Case Reason of Installation immediately via email and assign them to appropriate agents, and escalate cases that are still in New status after 4hours to support management, an administrator should use Auto-response rules, Queues, and Escalation Rules for case management.
Auto-response rules allow sending automatic email responses to customers based on case criteria. Queues allow grouping cases that share common characteristics and assigning them to a group of users who can access and work on them. Escalation rules allow escalating cases that meet certain criteria to higher-level users or groups and sending email notifications. Macros and Entitlements are not case management tools that can be used for this requirement. References:
https://help.salesforce.com/s/articleView?id=sf.case_autoresponse.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.queues_overview.htm&type=5https://help.salesforce.com/s/articl

Explanation
Flow builder is an automation tool that allows administrators to create flows that guide users through screens, collect data, and perform actions on records. It can be used to simplify the account creation process by creating a screen flow that shows only the essential fields for creating an account and hides any unnecessary fields or sections from the page layout. Approval process, workflow rule, and validation rule are not automation tools that can simplify the account creation process; they are used for different purposes such as approving records, updating fields, or enforcing data quality. References:
https://help.salesforce.com/s/articleView?id=sf.flow_builder.htm&type=5