If an employee attempts to edit the description field after submitting an opportunity for approval, they will be presented with a 'Record Lock' notification. This means that the record is locked for editing while it is in the approval process and only users with the "Modify All" permission or users above them in the role hierarchy can edit it. [Source]

All profiles will get access to the new field by default when it is created using Schema Builder. The app builder can modify the field-level security settings later to restrict access for certain profiles. Standard profiles, no profiles, and internal profiles are not correct options.

The two recommended solutions for the app builder to give the users appropriate access are creating a criteria based sharing rule to all opportunities with the sales operations public group and adding a permission set with
'View All" and 'Modify All'' opportunity permissions enabled. A criteria based sharing rule can grant read and write access to all opportunities that meet certain criteria to a specified group of users. A permission set can grant additional object-level permissions to users without changing their profiles. Option B is incorrect because adding a manual share for all opportunities with each user on the sales operations team is not scalable or maintainable. Option D is incorrect because creating a criteria-based sharing rule to share all opportunities with the sales operations private group is redundant, as private groups are used to manually share records with individual users or other groups.

Dynamic actions are a new feature that allow app builders to create custom buttons or actions that can call Lightning Web Components and display them conditionally based on field values or other criteria. Formula fields, AppExchange products, and custom links are not able to call Lightning Web Components.

LEFT(Account.Zip_Code_c, 5) is the correct formula to display only the first five digits of Zip Code from the parent Account. LEFT function returns the specified number of characters from the left side of a text string.
Account.Zip_Code_c is the custom text field that stores the Zip Code on Account object. 5 is the number of characters to return from the left side of the Zip Code. The other options are not valid formulas or functions.