Question

Invasive species often unbalance the ecosystems into which they are introduced because _______.

Answer 1

The correct awnser is A just took the test

Answer 2

The correct answer is (A)  They did not co-evolve with the natural species and lack natural controls, like predators.

An invasive species is a species that not belongs to that land where they are living and was introduced to that ecosystem naturally or deliberately to cause harm to that system as Invasive species  have tendency to spread to a degree believed to cause damage to the environment, human economy or human health.

Example of Invasive species include European rabbits, Grey squirrels, domestic cats.