1. Know your conjugation
Yo (i) - o
Tu (you) - as
el/ella/ud (this is used for 1 person, ex. Paula, Makenna, John) - a
Nosotros (we) - Amos
ellas/ ellos/ uds. (Used for multiple people, ex. The students, the teachers, the dogs) - an
Example:
#2 would be answer A because Flora is a single person, so we use the a ending
hope this helps :)