What best defines a population? the variety of traits a species has a group of organisms of one species all the different plants, animals, fungi, and microorganisms all the different habitats and ecosystems found around the planet

The correct answer is - A group of organisms of one species.

A population is a term that is used to describe the number of the individuals of one species. The population of a species can vary, and it can be very large, medium sized, or very low and on the verge of existence.

Also, this term refers to the number of organisms of the same species in a particular habitat. As that may lead to a little bit of confusion to explain... We may have few packs of wolves living in the eastern part of the United States, and we may have few packs of wolves that live in the western part of the United States. Despite all wolves being from the same species, the population do not have any contact between them and they are very far way from one another. Also, they live in different habitats, so we may say that the population of the wolves in the western part is ''blank'' and in the eastern part is ''blank'', but not to use both populations to describe all the individuals of the species in the country.