Which best describes why a liquid needs a container when a solid does not? solids fill their containers, and liquids have definite shapes. solids have definite shapes, and liquids fill their containers. solids particles do not expand to fill their containers, and liquid particles do. solids particles expand to fill their containers, and liquid particles do not.

B would be the answer.

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.