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 energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water

SOLUTION: C

PROBLEM: A delta can be seen from the air at the mouth of the Mississippi River. This delta was formed by  
 (A) erosion. (B) weathering. (C) conservation of soil. (D) deposition of sediment.

SOLUTION: D

PROBLEM: What energy transformation occurs when an electric lamp is turned on?  
 (A) electrical energy to light and heat energy (B) light energy to electrical and mechanical energy (C) heat energy to electrical and light energy (D) electrical energy to mechanical and heat energy

SOLUTION:
A