The crust’s role in allows it to provide the raw materials necessary for life on earth.
a.
the rock cycle
b.
biogeochemical cycles
c.
fossil fuel discovery
d.
the water cycle

I'd go with C, fossil fuel discovery. I hope this helps!

b. biogeochemical cycles

Explanation:

As for the sustenance of life on earth, the crust role is to manufacture the raw materials and hence necessary for the development of life on earth.As it consists of the abiotic factors and biotic factors or the biota are mostly depended on this for the survival sustenance of the plants and organic matter also. Most of the earth's crustal part is full of life and has a fossil fuel and various components that allow for the development of water, rocks and the other chemical cycles to prevail in it.