Step-by-step explanation:
(a) The modern environment theory
The Modern Theory is the integration of valuable concepts of the classical models with the social and behavioral sciences.
(b) Formation of new species
The formation of new species is also known as speciation.
(c) Evolution trends in organisms
Evolutionary trends represent directional changes in the average value of a given characteristic. It's a gradual process and takes many years as changes stabilize and give a rise to new species.