Ellos is them so the answer is D. It translates to They're Talking.
Answer:
What is the main purpose of this selection?
A. inform about the risks of technology in cities
B. describe the characteristics of an efficient and sustainable type of city
C. warn about the dangers related to the use of gas in cities
D. convince the listener about the advantages of using the Internet
Explanation:
The answer is : Yo estoy en la casa
The first one is C
The second one is A
The third one is B