Amineral that is can be split fairly easily along planes with weak atomic attraction
a.) streak
b.) cleavage
c.) luster
d.) hardness

You didn’t give us any choices

It feels feed the echo system

Because the carnivores keep the herbivore population in check 

Plants take energy from the sunlight with the of chlorophyll so the plant starts the food chain. then an herbivore eats the plant and gets its energy.then a carnivore or a human eats the herbivore and gets its energy. : )