What are the sources of the energy that drives the earth’s processes? Select one:

A. The sun and the earth’s interior.
B. The sun and chemical reactions.
C. The earth’s interior and chemical reactions.
D. The earth’s interior and gravity.

Which technology do environmental scientists use to track the movements or polar bears and other vulnerable populations? a) geographic information system(gis) b)environmental dna(edna) surveillance c) global positioning system(gps) d) unmanned aerial system (uas)