Enzymes reduce the activation energy allowing chemical reactions to occur in living things.
A. i think its this because they get their energy from gravity. its originally potential energy as a cloud but as the water droplets condense and collect into rain drops they get heavy and that potential energy is turned into kinetic energy. this isnt up there so A.
1 is the answer because it’s talking about chemical
The attraction that holds two covalently bonded atoms together is called covalent bond