Question

why are invasive species dangerous to the environment?
they pollute the environment.
they are always predators.
they threaten biodiversity.
they bring abiotic factors.

Explanation:

Invasive species are non - native organisms that enter a new ecosystem. They often out - compete native species for resources like food, water, and space. This competition can lead to a reduction in the number of native species, and in extreme cases, some native species may even go extinct. Biodiversity refers to the variety of life in an ecosystem, including the variety of species, genes, and ecosystems. When invasive species cause a decline in native species, the overall biodiversity of the ecosystem is threatened.

• Option “They pollute the environment”: Invasive species are not typically known for polluting the environment in the way that, for example, industrial waste or chemical spills do. Their main impact is on the biological components of the ecosystem, not pollution.
• Option “They are always predators”: Invasive species can be producers (like some invasive plants), parasites, or competitors for resources, not just predators. So this statement is incorrect as it generalizes their role.
• Option “They bring abiotic factors”: Abiotic factors are non - living components of an ecosystem like temperature, water, and soil. Invasive species are living organisms (biotic factors) and do not “bring” abiotic factors in a way that makes them dangerous to the environment.

Answer:

C. They threaten biodiversity.