Take another look at the sentence:
Gasping after the five-mile run in the summer sun, Donovan's thirst was
quenched with a bottle of cool water.
Gasping after the five-mile run in the summer sun, a participle phrase, comes right before thirst, an illogical target. [Donovan's, a possessive noun, functions as an adjective describing thirst.] The person, not the thirst, has lungs that can gasp! Before you continue, review the rules for misplaced and dangling modifiers.
Go back to the sentence to try again.