Explanation
A criteria-based sharing rule is a tool that allows administrators to share records with certain users based on field values rather than ownership. For example, a criteria-based sharing rule can share all opportunities with a cross-sell opportunity type with a specific group of users. A public group is a collection of individual users, roles, roles and subordinates, or other groups that can be used to simplify sharing settings and other processes.
In this case, the administrator can add the subject matter experts to a public group and give them access to records with a criteria-based sharing rule that matches the cross-sell opportunity type. References:
https://help.salesforce.com/s/articleView?id=sf.sharing_criteria_rules.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.public_groups.htm&type=5

Explanation
Default language and currency locale are two options that an administrator should configure in the company settings to support a global team of Salesforce users. Default language determines the language that is used for labels, buttons, tabs, help text, and messages in Salesforce for all users unless they override it in their personal settings. Currency locale determines the format of currency fields and numbers in Salesforce for all users unless they override it in their personal settings or enable multiple currencies. References:
https://help.salesforce.com/s/articleView?id=sf.admin_supported_languages.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.admin_supported_currencies.htm&type=5

Explanation
Page layout editor is a tool that allows you to customize the layout and organization of detail and edit pages for a specific object and record type combination. You can also use page layout editor to customize related lists on detail pages by adding or removing fields, changing column order, sorting records, etc. To meet the requirement of showing different fields on the Case related list from the Account record for Sales and Customer Care users, you need to use page layout editor to modify the related list properties for each page layout assigned to those users. References:
https://help.salesforce.com/s/articleView?id=sf.customize_layoutrelatedlists.htm&type=5

Explanation
Email-to-Case allows administrators to set up routing addresses that automatically create cases from incoming emails and assign them to queues based on predefined criteria. This way, emails from customers can generate cases automatically and be sent to the correct queue. A flow is a tool for building automated processes, but it is not designed for email routing. A custom email service is a way to process inbound emails using Apex code, but it requires coding skills and is more complex than Email-to-Case. An escalation rule is a way to escalate cases based on certain conditions, but it does not create cases from emails or assign them to queues.
References: https://help.salesforce.com/s/articleView?id=sf.customize_email2case.htm&type=5

Explanation
A dashboard filter is a feature that allows users to filter dashboard components by one or more field values without changing the underlying report data. For example, a dashboard filter can allow users to view cases by origin, status, or owner. A dashboard filter consists of a filter name, one or more source fields, and one or more filter values. Users can apply one or more filters to see different views of the dashboard data.
References: https://help.salesforce.com/s/articleView?id=sf.dashboards_filters.htm&type=5