You are given a science question (hard-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 of these is an example of water changing from water vapor to liquid?
(A) moisture forming on a mirror when you breathe on it (B) sweat forming on your body when you exercise (C) ice cubes melting when you put them in a warm liquid (D) rivers drying up during a very hot summer

A: A
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Q: According to cell classification, prokaryotic cells are separated from eukaryotic cells. Which feature is often used to distinguish prokaryotic cells from eukaryotic cells?
(A) life processes (B) size differences (C) plasma membranes (D) energy molecules

A: B
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Q: Some plants produce fruit such as apples. What is one function of a fruit?
(A) to protect seeds (B) to produce food for seeds (C) to stop seeds from dispersing (D) to store water for seed germination

A:
A
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