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:
Claudia's teacher places a photograph of an organism on the board. He asks Claudia to determine if the organism is a plant or an animal. The answer to which question will best help Claudia determine if the organism is a plant or an animal?
(A) Does the organism have cells? (B) Does the organism reproduce? (C) Does the organism live in the forest? (D) Does the organism make its own food?
answer:
D

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
answer:
B

question:
When compared to current average conditions, which term would best describe conditions in Earth's lower atmosphere if greenhouse gases were absent?
(A) denser (B) cooler (C) wetter (D) cloudier
answer:
B