Which processes must happen for sand to eventually become metamorphic rock? In one to two sentences, name and briefly describe the processes. I NEED HELP ASAP PLEAS ( I clicked random subject srry)

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves. b. when a river overflows it moves downhill resulting in the formation of caves. c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves. d. when water empties into lakes, sediment is deposited, resulting in formation of caves.

What are the characteristics of a mediterranean climate, and where is this type of climate found in the middle east? write a paragraph of at least five sentences discussing temperature, rainfall, seasons, and plant and animal life.