TASK DEFINITION: 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.
PROBLEM: In 1971, the bones of an extinct flying dinosaur were discovered. This kind of discovery helps everyone learn more about
(A) impact of humans on Earth. (B) effect of gravity on animals. (C) history of animal species on Earth. (D) likelihood that dinosaurs will reappear.

SOLUTION: C

PROBLEM: Which is an example of a form of electrical energy?
(A) lightning (B) windmill (C) radio waves (D) sound waves

SOLUTION: A

PROBLEM: All animals need air to survive. An insect gets air through tiny holes on the sides of its body. A whale breathes through a blow hole. What body part do fish use to breathe?
(A) gills (B) skin (C) nose (D) mouth

SOLUTION:
A