What is the importance of photosynthesis?

It's not oxygen production. The essential characteristic of photosynthesis is to convert solar power into chemical energy and then keep that chemical power for future use. For the most part, the planet's residing systems are powered by using this process.

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.