The audience for a piece of writing is a doctor, and the purpose is to describe your earache.

What type of language and word choice best suits this audience and purpose?

formal; words that are specific to the pain

informal; words that are vague

formal; words that are exaggerated

Formal language and word choice that is specific to the pain would be the most suitable for this audience and purpose. This includes using medical terminology and descriptive language to accurately convey the symptoms of the earache. Exaggerated language would not be appropriate for a doctor, as it may hinder their ability to accurately diagnose and treat the issue.