In the Spanish language, the word "linterna" is the equivalent of "flashlight" or "torch" in English. This means, la linterna is a portable object that projects light and therefore it is used to see things in the dark such as using a lantern in a forest at night. Additionally, the word "linterna" in Spanish derives from a Latin word that means portable light. According to this, from the options given the article that would help you to see things in the dark is "la linterna".
los amigos estan listos para ir ala playa,marissa dice que esta confundida el empleado busca la reservacion. el empleado da las llaves de las habitaciones alas chicas. miguel grita.