Explanation
Split views are a feature that allows users to view records as a split list on object home pages in Lightning Experience apps that use console navigation. Split views show records in two panes: a list view pane on the left and a record detail pane on the right. Users can switch between different list views and records without losing context or scrolling. However, split views are only available on standard objects such as accounts, contacts, leads, opportunities, cases, etc., and not on custom objects such as shipments. References:
https://help.salesforce.com/s/articleView?id=sf.lex_split_view.htm&type=5

Explanation
A related record component is a type of component that allows users to view and edit fields from a parent record on a child record page without leaving the page. For example, a related record component can allow users to update the account status from the case layout by selecting an account record from a drop-down list. A rich text component is a type of component that allows users to display formatted text on a record page using rich text editor tools such as bold font, bullet points, images, and links. For example, a rich text component can display a message in bold font when a case is saved as acriticalrecord type by using conditional visibility rules.
References:
https://help.salesforce.com/s/articleView?id=sf.lightning_page_components_related_record.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.lightning_page_components_rich_text.htm&type=5

Explanation
When you delete a custom field, the data in that field is stored for 20 days before it is permanently deleted.
During this time, you can restore the field and its data from the Recycle Bin or use Data Loader to export the data. References: https://help.salesforce.com/s/articleView?id=sf.customize_del_field.htm&type=5

Explanation
A lookup field is a type of field that allows administrators to create a relationship between two objects by linking records from one object to another object. For example, a lookup field can link an account record to a purchase record by storing the account ID on the purchase record. A lookup field allows users to select an existing record from a pop-up window or create a new record from the same window. References:
https://help.salesforce.com/s/articleView?id=sf.relationships_lookup.htm&type=5

Explanation
Knowledge articles are documents that provide information or solutions about products, services, or processes in Salesforce. You can use knowledge articles to respond to customers quickly and consistently with accurate information. You can create different types of articles with different templates and fields, such as FAQ articles, troubleshooting articles, how-to articles, etc. To meet the requirement of responding to customers with the top five troubleshooting tips that could help solve their issue, you need to create knowledge articles with those tips and attach them to your email responses or case comments. References:
https://help.salesforce.com/s/articleView?id=sf.knowledge_article_types.htm&type=5