Your answer is speciation
That they become an invasive species.
mutualism but if it become persistent then it becomes symbiosis
When one species becomes two, it can no longer interbreed successfully, leading to reproductive isolation. This divergence often occurs due to genetic differences, environmental adaptations, or behavioral changes that prevent mating between the two groups. As a result, each species evolves independently, adapting to its distinct ecological niche over time.
To put it simply, new species can form when organisms within a population become so genetically different they can no longer reproduce with one another without generating harmful mutations. This can be caused by genetic drift and geographic isolation. Two populations of the same species who live in different parts of the world will diverge and go on separate genetic paths, until eventually the two populations become genetically different and branch off into two different species.
No one knows what humans will look when they become a new species. It will depend on the type of species that humans evolve into that will determine what they look like.
Through evolution. There are two main kinds of evolution which are gradualism and punctuated equilibrium. In gradualism, natural selection slowly removes unfavorable traits for the environment that the species is living in. After many years the different habitats will result in two species. This same theory is true for punctuated equilibrium except that in p.e. there is a sudden burst of change followed by a dormant state of evolution for the species.
When two groups of the same species are cut off from each other, they evolve from mutations and natural selection independently. Each one could evolve into a different species. For instance, let's say two populations of a species of bunny exist, one in a desert and one in the artic. The one in the desert would likely evolve into a bunny which could keep cool and blend into rocks and sand, while the population in the artic would likely evolve into a species which could keep warm and blend into snow. The one species of bunny would then become two.
The superior competitor is likely to outcompete the other species for resources, leading to a decrease in the population of the inferior competitor. This could potentially lead to the inferior competitor being displaced or evolving to occupy a different niche to reduce competition.
Divergent evolution
Parallel evolution: two (or more) species or genera that evolve in similar ways over time. Divergent evolution: two or more closely related species or genera that evolve to become quite different from one another. Convergent evolution: two or more unrelated and dissimilar species or genera that evolve to become similar to one another, for example penguins (birds that used to fly), dolphins (mammals that used to walk on land) and fish (animals that were always swimming)
It will become extinct