Direct object.
The direct object receives the action of a verb in a sentence.
The indirect object represents to whom or for whom something is said.
Ex: Sandra gave the book to Tom.
Sandra is receiving the action: she gives the book
Tom is the one getting the object
The answer is A, I’m sure
Answer:
ROB
Explanation:
Rob is the complete subject since he is the main "character" in the sentence. Mary is secondary. 'Rob' sent a letter to (blank). Without Rob, we wouldn't be reading about sending a letter. Hope that makes sense!