The answer you are looking for is "<span>a. elements of ecosystems are mutually dependent on each other ".</span>
C) 30 miles is the correct answer
(I’m not sure but I think so)
it is impossible for a map projection to be accurate. the most common one is the mercator projection. Many projections have been tried but all very flawed. the most reliable form of a map is a globe but of course, it's not a projections...so.