1.Mi abuelita vive en Santiago
2.Yo ayudaría a
3.¿En dónde vives?
4.Ella está cansada
5.Fuimos a la fiesta
6.Estaba viendo la tele
7.¿Dónde está mi celular?
8.Trabajo en AIRCA
9.No he estado cantando
10.Caminaba a lo largo de la calle
11.Estamos bebiendo café
12.He sido vivir aquí para una semana
13.¿Quien me puede ayudar?
14.Estaba bailando con Harry
The answer to the question is called "homophones". These words have same pronunciation, but different spellings.
I believe your answer is A because almost all people with knowledge know that grass is green. Someone would only ask this if they weren't for sure, such as someone being color blind. Hope this helped!
Thanks!
~Steve