Respuesta :
The branch of science which deals with genes and inheritance is called genetics.
The correct option is D.
The gradual change in the species over the period of time to fit in the nature is called evolution.
The gene flow is defined as the flowing or exchanging of one continent's genes from the other continents. Due to the exchange of genes, the flow of genes has altered the native genes and formed a new character.
Therefore, the correct answer is D that is gene flow.
For more information, refer to the link:-
https://brainly.com/question/19524691
