Question

Why does Aeolus refuse to help Odysseus a second time?

He has other things to do.
He thinks Odysseus is cursed.
He thinks Odysseus is greedy.
He thinks Odysseus is ungrateful.

Answer 1

It's the second one, He thinks that Odysseus is cursed because he believed that the gods are angry with him [due to the failure of the first voyage].

Answer 2

He thinks Odysseus is ungrateful.