Community, habitat is in general and ecosystem is the whole place, not just the soil.
A part of the definition of binary fission is "splitting in half." It is an asexual form of reproduction, one turns in to two. This is choice B.
I believe it should be 1. Hope this helps.
Answer:
Cancer is caused by changes to certain genes that alter the way our cells function. Some of these genetic changes occur naturally when DNA is replicated during the process of cell division. But others are the result of environmental exposures that damage DNA.
B.)
Weathered rock
I hope this helped