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.

Which plant is grown for food?  
 (A) Rice (B) Tobacco (C) Orchid (D) Cotton
A

Which property of air does a barometer measure?  
 (A) speed (B) pressure (C) humidity (D) temperature
B

What is an example of a shelter in an ecosystem?  
 (A) a gray squirrel eating an acorn (B) a raccoon in a hollow log (C) a blue whale migrating (D) a tick feeding on a coyote

B