A specieces that impacts the survival rates of another species in an ecosystem is known as a
niches species
b
extinct species
c
endangered species
d
keystone species

i'd say that the moon rock is about 2.2 billion years old.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

the answer is 100% density i've answered this question before and done the quiz myself.