Answer:
B. market
Explanation:
A market economy is an economic system in which the decisions regarding investment, production and distribution are guided by the price signals created by the forces of supply and demand. The major characteristic of a market economy is the existence of factor markets that play a dominant role in the allocation of capital and the factors of production.
You didn't put any answer choices but it's to stop the ozone layer from going away.
3 things include a earthquake, a volcano eruption or a earthquake and tsunami. Hope this helps.
