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").

Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air
B

What uses eyes to see by sensing light? (A) trees (B) algae (C) worms (D) elephants
D

What does the earth orbit that causes the seasons to change? (A) plasma star (B) venus (C) mercury (D) pluto

A