Which of the following is a reason for the greater biological diversity of tropical regions ?
(a) Tropical latitudes have remained almost undisturbed for millions of years.
(b) Tropical environments are less seasonal, relatively more constant and predictable.
(c) More solar energy is available in the tropics, resulting in high productivity.
(d) All of these

Options

A. 1 and 3
B. 2 and 3
C. 1 ,2 and 4
D. 1,3 and 4

Answer

D