Question

Why is photosynthesis the most important life process on the earth? Explain.

Answer 1

The energy contained by photosynthesizers in organic molecules is the source of life for most living organisms, and the oxygen emitted during photosynthesis triggers cellular respiration.

Complete answer:
The mechanism by which organisms transform light energy into chemical energy is photosynthesis. In chlorophyll-containing plants, algae, and cyanobacteria, the most natural and essential form of photosynthesis takes place. These species absorb the sun's radiant energy and convert it to chemical energy contained in carbohydrate molecules by utilising carbon dioxide and water. As by-products, oxygen and water are released.

The generalized equation is:
$6CO_2+H_2O \rightarrow C_6H_{12}O_6+6O_2+6H_2O$
The significance of photosynthesis in the maintenance of life on Earth would be difficult to overestimate. There will soon be no food or other organic matter on Earth if photosynthesis stopped. The bulk of life would die, and the Earth's atmosphere would become almost devoid of gaseous oxygen with time.
Chemosynthetic bacteria, which are able to use the chemical energy of certain inorganic compounds and are thus not relying on the conversion of light energy, will be the only species able to survive under certain conditions without photosynthesis.
The fossil fuels (i.e. coal, oil, and gas) that power modern civilization are responsible for the energy generated by photosynthesis carried out by plants millions of years ago. Green plants and small animals that feed on plants have evolved quicker than they were eaten in previous centuries, and their fossils have been accumulated by sedimentation and other natural processes in the Earth's crust.
The single most essential mechanism on earth is photosynthesis, for neither plants nor animals (including humans) will exist without it. The energy contained by photosynthesizers in organic molecules is the fuel of life for most living organisms, and the oxygen released during photosynthesis makes cellular breathing possible on earth, and thus life.

Note: In an environment where the human population is increasingly growing, needs for food, resources, and energy have produced a need to increase both the amount of photosynthesis and the efficacy of transforming photosynthetic production into goods that are useful to humans.