What may occur if workflow rules are reevaluated after a field change by afield update?

Universal containers needs to flag Leads with one or more business areas. They need to add a field to capture these to the Lead records. There is no need to report on this field.
What is the appropriate field type?

Universal Containers uses a custom picklist called Account_Region__c on the Account object. The vice president of sales has asked that the value of this field is visible on Opportunities.
How should an app builder create this solution?

An app builder has been asked to provide users a way to identify a Contact's "Preferred Contact Method" direction on Contact record. Users need to be able to identify whether a phone number or an email, is the Contact's preferred communication method. Which filed type will allow the App Builder to accomplish this with the fewest fields possible?

On the Account Lightning record page, users need to see ten fields and the ability to sort and wrap text on their Related Lists.
What Related List type would the app builder select for the Related List Lightning component?