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.

[EX Q]: The cells of a plant help the plant maintain its life functions. What part of a plant cell has the function of producing sugar in the presence of sunlight?  
 (A) chloroplast (B) cytoplasm (C) mitochondria (D) nucleus
[EX A]: A

[EX Q]: One role of a producer in a food chain is to provide  
 (A) water for plants (B) sunlight for plants (C) nutrients for animals (D) shelter for animals
[EX A]: C

[EX Q]: Which process of the water cycle transports water from plants to clouds?  
 (A) precipitation (B) transpiration (C) condensation (D) sublimation
[EX A]:
B