Question

in the context of global population calculations, why can immigration and emigration be omitted from consideration? humans are generally not coming to or leaving the earth. human global populations cannot be calculated at all. humans travel to and leave earth very often. the human global population never changes year after year.

Explanation:

Global population counts all humans on Earth. Immigration/emigration involve movement between regions on Earth, not entry/exit from Earth. Since no significant number of humans leave or arrive from outside Earth, these movements do not affect the total global population and can be omitted.

Answer:

A. Humans are generally not coming to or leaving the Earth.