Yes there are such sentences. “He eats food.” and “People often sleep.” are both examples.
Answer:
the fleet of ships leaves
Explanation:
You would say the fleet leaves not the fleet leave.
The 'of ships' isn't relevant since we are not talking about the ships leaving, but rather the fleet.
Hope that helps :)
Answer: A and B
Explanation: C is coming from your own ideas, and D is just not citing a source correctly.
I would say that this is true, because an autobiography would be considered more of a descriptive text than a persuasive text.