Explanation
Case escalation rules are a feature that can be used to meet this requirement. Case escalation rules can automatically escalate cases that meet certain criteria, such as being open for more than a specified time or having a certain priority. Escalation rules can assign cases to a different owner or queue and send email notifications to the support manager or other recipients. References:
https://help.salesforce.com/s/articleView?id=sf.case_escalation.htm&type=5

Explanation
The AppExchange is an online marketplace where you can find solutions to enhance your Salesforce organization. Some of the solutions you can find on the AppExchange are consultants and components.
Consultants are certified professionals who can help you with your Salesforce projects, such as implementation, customization, integration, training, etc. Components are reusable building blocks that you can use to create apps or pages in Salesforce, such as charts, calendars, maps, buttons, etc. References:
https://appexchange.salesforce.com/consultants https://appexchange.salesforce.com/components

Explanation
To prevent users from selecting more than one value on a picklist field, the administrator needs to change the field type from a multi-select picklist to a regular picklist, and select the "Choose only one value" checkbox on the field definition page. This will ensure that only one value can be selected on the record page and in reports and filters. References: https://help.salesforce.com/s/articleView?id=sf.customize_picklists.htm&type=5

Explanation
Web-to-Case and Email-to-Case are two solutions that allow customers to create cases from a web form or an email. Web-to-Case generates HTML code for a web form that you can place on your website. Email-to-Case converts incoming emails into cases.
References: https://help.salesforce.com/s/articleView?id=sf.customizesupport_web_to_case.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.customizesupport_email_to_case.htm&type=5

Explanation
To protect data with backups by using Data Export Service, two considerations that the administrator should remember when scheduling export are:
Data Backups are limited to weekly or monthly intervals depending on edition and license type Metadata backups must be run via a separate process such as Metadata API or change sets because Data Export Service only exports data (records) Metadata backups are not limited by sandbox refresh intervals. Data Export Service should be run from production orgs unless testing purposes require otherwise. References: https://help.salesforce.com/s/articleView?id=sf.data_export.htm&type=5