Which is the study of past and present distributions of organisms on earth?

A) biogeography
B) biological ecology
C) distribution biology
D) geographical ecology
E) organismal geography

Biogeography

The study of the distribution of species and ecosystems in geographic space and through geological time, including the factors that influence these distributions.

Distributions of Organisms

The geographical and ecological patterns in which species and populations are spread across different habitats and regions.