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").

Thick feathers can be used for (A) climbing, cracking nuts and peeling fruit skins. (B) courtship and looking for food (C) killing prey, preening and feeding young (D) staying weatherproof, flexible and free of bacteria
D

The population of rabbits in an area increases. That could have been caused by (A) More predators have been moving into the area (B) The rabbits are becoming infertile (C) Hunters are trapping the rabbits (D) More precipitation falling lately
D

do ecosystems remain the same? (A) they are altered with time (B) ecosystems are always the same (C) with time they only grow (D) ecosystems experience very little change

A

