Not completely sure but logically people go to cities to find jobs :) hope this helps
During the Cenozoic era,mountain building in western North American was caused by tectonic activity.
~Hope this helps!
it could also be (the discount rate on overnight loans is lowered) this could also be one of your answers
The answer is; plankton
The major group of plankton that contribute to earth’ crude oil are phytoplanktons because of their great numbers – even though they are microscopic. They are the base of the food chains in the oceans because they are the main primary producers. Examples of phytoplankton are the dinoflagellates, cyanobacteria, diatoms and blue-green algae.
