What happens in the process of gravitational condensation? An object decreases in size due to the collision of materials.
An object increases in size due to the addition of materials.
Gas particles are formed from solar nebula materials.
Solid particles are formed from solar nebula materials.

The thing that happens in a happens in the process of gravitational condensation is A "An object decreases in size due to the collision of materials".

In conclusion, the correct option is A.

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answer:    

a.

explanation:

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.