instruction:
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
question:
Rock layers with sand-sized particles were most likely deposited by  
 (A) wind. (B) water. (C) glaciers. (D) landslides.
answer:
A


question:
Which animal eats only plants?  
 (A) Cat (B) Dog (C) Lion (D) Rabbit
answer:
D


question:
Some birds live in a forest. If many of the trees in the forest are cut down, the shelter for the birds will  
 (A) decrease (B) increase (C) remain the same
answer:

A