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").

Animals adapt to their what? (A) appearance (B) feet (C) skin (D) nature places
D

pushing against a rolling boulder will decrease its (A) size (B) height (C) impetus (D) ambitions
C

Burning natural gas can (A) keep you cozy on a frigid night (B) conserve valuable planetary resources (C) aid in cooling down the planet (D) keep a car running in the cold

A