In a specific ecosystem, the population with the greatest number of members will be the

In this situation, the population with the greatest number will be the producers.

Explanation:

In a specific ecosystem, the population with the largest number of members will be the producers.

Producing organisms are those that, through inorganic molecules, are able to synthesize their own food (called autotrophs). They make up the first trophic level of food chains and are essential for the balance of ecosystems.

Almost the majority of the producing organisms are photosynthetic, and can be plants, algae, cyanobacteria, protists and other single-celled organisms capable of using light as an energy source for their own survival. A small number of producers use chemical energy from the oxidation of molecules as an energy source. These organisms, exclusively bacteria, perform chemosynthesis.

the correct answer is:

a population changes in response to a change in the environment.