What effect can invasive introduced species have on biodiversity? a. They decrease biodiversity by displacing native species. b. They increase biodiversity by increasing the number of species present in a habita c. They have no effect on biodiversity. d. They decrease biodiversity by eliminating primary consumers in the food web.

The correct answer is a. Invasive introduced species can have a negative effect on biodiversity by displacing native species. When a non-native species is introduced to an ecosystem, it can outcompete native species for resources such as food, shelter, and space. This can lead to a decline in the population of native species and even their extinction in some cases. As a result, the overall biodiversity of the ecosystem decreases.