Which of the following does NOT favour speciation?

Speciation is generally a function of time. Tropical latitudes have remained relatively undisturbed for millions of years, providing a long evolutionary time for species diversification.

Tropical environments are less seasonal, relatively more constant, and predictable. Such constant environments promote niche specialisation and lead to greater species diversity.

There is more solar energy available in the tropics, which contributes to higher productivity and indirectly to greater diversity.

Drastic seasonal variations are characteristic of temperate regions and do not favour speciation or species diversity.

Answer: Drastic seasonal variations