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: The basic life functions of an organism are carried on by  
 (A) cells (B) nutrients (C) atoms (D) hormones

SOLUTION: A

PROBLEM: What force pulls things towards the center of Earth?  
 (A) magnetism (B) gravity (C) friction (D) energy

SOLUTION: B

PROBLEM: A group of students investigated the effect of water temperature on the gill movements of goldfish. The students tested water temperatures from 20°C to 10°C at 2-degree intervals. The data showed that as water temperature decreased, the average number of gill movements per minute by the goldfish also decreased. Which type of display is BEST used to show this relationship?  
 (A) a bar graph (B) a pie chart (C) a line graph (D) a tally chart

SOLUTION:
A