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

Answer: B


Question: Some pea plants always have peas with smooth skin. Other pea plants always have peas with wrinkled skin. How can a student best predict which kind of pea will grow from a seed that is planted?  
 (A) by checking the amount of water in the soil (B) by checking how often the pea plant receives sunlight (C) by checking how much space the plant will have to grow (D) by checking the type of peas growing on the parent plants

Answer: D


Question: Which of the following explains why elements, such as carbon and oxygen, that are used in organic molecules are not permanently removed from the environment?  
 (A) They are replenished by sunlight. (B) They are cycled through ecosystems. (C) They are replaced by volcanic eruptions. (D) They are produced constantly from nutrients.

Answer:
B