Which organisms create all usable food energy on earth

What is the primary goal of human communities?

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels