I think the answer is Salinization
Command economy is when the government is controlling the price of goods <span />
Answer:
It can be availability of raw materials cheaply and abundantly
Government policies
Labour, both skilled and unskilled
Closeness to market
Answer:
The correct answer is: A) Asteroid belt.
Explanation:
All of the other events can be explained by colliding worlds in the early solar system but the asteroid belt can't. The asteroid belt originated from the primitive solar nebula as a congregation of planetesimals, which were the precursors of the protoplanets.