The right answer is:
"Yo trabajo en mi tarea".
That´s because is talking in first person.
"Trabajas" is for "you".
"Trabajan is for "they"
and "Trabajamos" is for "we"
Pamela: cuanto cuesta la computadora ---> how much does the computer cost?
10 body parts in Spanish
La manos = hands
La frente = forehead
La nariz = nose
El pecho = chest
El pie = foot
El hombro = shoulder
La cara = eyes
La boca = mouth
La ceja = eyebrows
El ojo = eyes