These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). Each of these four spheres can be further divided into sub-spheres
The Rocky Mountains are described as younger because the Rocky's are really two mountain chains. The older mountain chain started billions of years ago, and the younger mountain chain pushed the older mountain chain up more, only 60 millions years ago.
The correct answer of the given statement above whether it is true or false would be TRUE. It is true that the Andean nation of Bolivia is poor, but but<span> rich in natural attractions that fuel a growing ecotourism economy. </span><span>Bolivia is named for Simon Bolívar. He is the liberator of much of South America that is poor, mountainous, and landlocked. Hope this answer helps.</span>
