Question

select the part of the subject that agrees with the bold verb. every morning, a dog on roller skates passes by jade hernandez on the street.

Explanation:

The subject of the sentence is "a dog on roller skates". The bold verb is "passes", which is a singular verb. The part of the subject that agrees with the verb (in terms of subject - verb agreement, as "a dog" is singular and "passes" is singular) is "a dog". The prepositional phrase "on roller skates" modifies "a dog" but the main subject part that determines the verb agreement is "a dog".

Answer:

a dog