The tilt of the earth on its axis as it rotates around the sun accounts for ___ (A) the seasons of the Northern and Southern Hemispheres,

(B) the absence of seasons at the equator

(C) both A and B.

d. groundwater flows through the subsoil and deposits minerals.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.