A body is falling from rest describes distances S1, S2, and S3 in the first, second and third seconds of its fall. Then the ratio S1 : S2 : S3 is

B) raising the temperature and reducing the volume of the gas.|-/ 

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.

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;