Q: 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").
As they are immobile, what is an example of how animal life helps the reproduction cycle of plants? (A) squirrels dropping seeds (B) birds building nests (C) human lumber industry (D) bugs eating leaves
A:
A