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:
Which describes a specific characteristic necessary for survival in the desert?
(A) conserving water (B) hiding from predators (C) hibernating for long periods (D) producing many offspring
answer:
A

question:
Planets in the solar system are in constant motion. What factor has the greatest effect on the orbits of the planets?
(A) the size of the planets (B) gravitational pull of the Sun (C) the composition of the planets (D) electromagnetic radiation from the Sun
answer:
B

question:
The air in front of a meteor is compressed as it passes through the atmosphere of Earth. This causes the meteor to
(A) gain mass. (B) gain velocity. (C) increase in temperature. (D) increase in surface area.
answer:
C