Respuesta :
The study of an environment is called ecology. The ecosystem is made up of two components and these are biotic and abiotic factors.
The correct answer is option D to Introduce members from one population into the other population’s habitat to see if they interbreed.
What is the population?
The group of species that lives together in a given period at a given time is called population.
According to the question, the two species can be identified by their physical appearance. Any species can be which has a common ancestor but they are living up in different habitats have different physical appearances.
Hence, both fish can be identified differently easily.
For more information about the population, refer to the link:-
https://brainly.in/question/9531558