Which of the following crops is grown at lower elevations? a: wheat b: coffee c: apples or d: bannas

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?

Can you give me 10 impacts of global warming? the one that gives me causes and responses gets the brainliest answer : )

How do oceanographers measure the salinity of ocean water?