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Thescientific discipline of biologythat focuses on thediversity of lifeand traits which evolve adaptation in human beings in the natural environment is called evolutionary biology.

Various phenomena involved in evolutionary biology are speciation and evolution of aging, cooperation, and sexual reproduction. The evolution of ostriches and emus is an example of evolutionary biology.

The term species diversification represents a rate that determines theformation and extinction of speciesin a particular location.

The several processes of evolution include diversification within species (gene flow and gene mutation) and diversification between species (natural selection and genetic drift).

In evolutionary biology,when multiple species evolve at a faster rate from their common ancestor and these species outspread into new environmental niches, it is called adaptive radiation.

Mass extinction (species dying out at a faster rate in a short time period), species migration to a new area for new ecological opportunities, and diversification of organisms to provide food sources are several factors promoting adaptive radiation.