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 form of energy are x rays and ultraviolet light?
(A) nuclear (B) heat (C) electromagnetic (D) chemical
[A]: C

[Q]: Why would animals most likely have to leave an area during a drought?
(A) to find mates (B) to find shelter (C) to escape predators (D) to find water and food
[A]: D

[Q]: A euglena has a flagellum and a paramecium has cilia. Both types of organelles help these organisms move through the water. However, a paramecium can also use its cilia to perform another task. What is this task?
(A) obtain food (B) defend the cell (C) attach to a surface (D) perform conjugation
[A]:
A