TASK DEFINITION: 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.
PROBLEM: Which of these will most likely harm a habitat?  
 (A) planting trees (B) water pollution (C) rainfall (D) sunlight

SOLUTION: B

PROBLEM: Which of these statements about nonrenewable resources is true?  
 (A) They are inexpensive. (B) They help keep the air clean. (C) They can take millions of years to form. (D) They are used because they are easily removed from the ground.

SOLUTION: C

PROBLEM: Which is a learned behavior?  
 (A) A dog uses its tongue to drink. (B) A robin holds a branch with its feet. (C) A chimpanzee digs for termites with a stick. (D) A worm moves to the top of flooded ground.

SOLUTION:
C