In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

[Q]: If something is in an ecosystem, it could be (A) invisible (B) vacuum of space (C) lacking life (D) alien
[A]: C


[Q]: Which is likely to provide an undesired acquired characteristic for an organism? (A) a light scratch on its leg (B) learning to leave the nest (C) finding a potential mate (D) dipping a foot in magma
[A]: D


[Q]: What requires nutrients to grow? (A) metals (B) birds (C) dirt (D) computers
[A]:
B