The answer is escucha.
The subject here is Marta, and we have to conjugate the verb to match the subject, which is a 'she' and you just add 'a' to the stem.
¿Qué hizo Francisco cuando la maestra hablaba? ... El listón de azul de seda para el dibujo.
1. True || 2. True || 3.True || 4.True || 5. False
For the first one, the answer is A. And for the second one, the answer is D.