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.

Humans use both renewable and nonrenewable resources. Which human activity uses a nonrenewable resource?  
 (A) building houses with wood (B) using natural gas to heat homes (C) using solar energy to power lights (D) producing electricity from flowing water
B

Which is a major difference between the life cycles of different types of plants?  
 (A) the way they die (B) the energy they use (C) the way they reproduce (D) the way they make food
C

How would the woodpecker population in a forest area most likely be affected if a housing development is built in that area?  
 (A) They would produce more offspring. (B) They would change the color of their feathers. (C) They would experience a decrease in available food. (D) They would experience a decrease in competition.

C