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.

Q: Which process in the water cycle returns water from the surface of Earth to the atmosphere?  
 (A) condensation (B) evaporation (C) precipitation (D) runoff

A: B
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Q: Which substance do all living things require to survive?  
 (A) blood (B) water (C) carbon dioxide (D) organic soil

A: B
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Q: Which of the following is a living component of a desert in California?  
 (A) low rainfall (B) hot temperature (C) polar bear (D) horned lizard

A:
D
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