The direct object would have to be the muscle's ability because it answers the question "what".
e.g: Exercise can increase what? The muscle's ability.
The title of the story is Federigo's Falcon where Federigo is one of the main characters.
He is an owner of a farm in a country estate. He falls in love with a woman who was already married to a wealthy man and has a son. Although her husband died, she is not willing to take another man to be her husband.
Answer: D
Explanation:Help me with my math question pleasee