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".
