How do producer population with an herbivore compare to the results you found in the first simulations without a herbivore??

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

Rays from the sun are not considered matter true or false

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as