Help me with these two questions, please. ONLY CORRECT ANSWERS!

Complete the sentence with the correct form of the verb: Yo no __________ la lección.

Question 2 options:

a)
Entendo


b)
Entiendes


c)
Entiendo


d)
Entendemos



Complete the sentence with the correct form of the verb: Algunos pájaros no _________ (volar).

Question 10 options:

a)
Vuelan


b)
Vuelen


c)
Volan


d)
Vuele