Here are the correct answers for your questions:
Question 1
A) Which is the correct form of the present progressive of the verb?
tú: repetir
Response: estás repitiendo
Question 2
A) Which is the correct form of the present progressive of the verb?
yo: servir
Response: estoy sirviendo
Question 3
A) Which is the correct form of the present progressive of the verb?
ellos: dormir
Response: están durmiendo
Question 4
A) Which natural landmark is found in Canaima National Park?
Response: Angel Falls
Question 5
A) Andrés Bello's Las silvas americanas described _______.
Response: the culture and landscape of South America
Let me know if you need any further assistance!