Answer:
A direct object indicates the object on which the action is performed.
Explanation:
Some examples:
I wrote my homework.
I bought a new notebook.
Pour me some water.
I don't feel remorse.
2) son
3) son/hay
4)eres
5) es
6) es
7) son
8) es
9) son
10) son/es (could be either)
The correct answer is:
A. ¿Has tratado de bucear?
Have you (singular, informal) tried to snorkel?

Yo abro la Puerta para mi abuela