Question

study the image. zebra mussels are an invasive species. they inhabit freshwater lakes and rivers. what impact might they have on a native ecosystem, based on this image? they increase biodiversity. they help balance the ecosystem. they crowd out native animals.

Explanation:

Zebra mussels are invasive species. Invasive species often disrupt ecosystems. Crowding out native animals is a common negative impact of invasive species. Since they are invasive, it's unlikely they increase biodiversity (as that would be positive for the ecosystem) or help balance it (invasive usually unbalance).

Answer:

They crowd out native animals.