The terrain is one thing they study, for example, if it is woody, or a plain, or rocky, or if it has mountains, etc.
they also study the plants, animals, etc and how they survive in the conditions
hope this helps
There main role used to be as nurses or cooks or easy jobs
Under the Truman Doctrine, the United States became committed to helping countries that were a) fighting a Communist takeover.
The main way in which the Ancient Greeks changed the ways in which people dealt with legal issues is that they implemented a system of direct democracy, giving people the opportunity to vote directly on the legal issues that affected them.