List three different regions of Puerto Rico, and tell how people earn a living in each one.​

Which term describes a possible explanation of, or answer to, a scientific question that is based on prior knowledge or research and that is testable?

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.

Recently, there has been pressure to loosen clean air standards. use economic arguments to support or oppose this proposed action.