The answer is the first option. Let me explain. The question is telling you to choose a pair of words that are not related.
Piscina; ir al cine = Swimming pool; go to the cinema
Televisor; Mirar = Television; watch
Tiempo libre; relajarse = Free time; relax
Periódico; leer = Newspaper; read
Answer:
1. Vamos a ir a nadar en la playa
2. Ellos van a ir a mirar la televisión
3. Nosotros vamos a ir a correr
4. Tu y yo vamos a ir a comer tacos
5. Voy a ir a escribir cuentos
Explanation:
Piensa would be the correct answer since Marsha is the same as saying él/ella/usted, and for -ar verbs the conjugation for third person is -a
Van because the other answers are incorrect