The most massive chemical reaction on Earth, responsible for all life in some way, is – F the carbon cycle, decomposing carbon in rich nutrients.
G photosynthesis, the use of light energy to make energy rich molecules.
H digestion, the break down of chemical energy in the gut of organisms.
J the hydrologic cycle, using water to make energy.

Rn in the right answer

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy