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.

Lichens are symbiotic organisms made of green algae and fungi. What do the green algae supply to the fungi in this symbiotic relationship?  
 (A) carbon dioxide (B) food (C) protection (D) water
B

Which of the following helps the body to cool down?  
 (A) shivering (B) sweating (C) running a fever (D) taking deep breaths
B

Where does water in a lake get most of its energy to evaporate?  
 (A) The sun heating the lake (B) Green plants living in the lake (C) Streams entering the lake (D) Cold springs under the lake

A