Why are invasive species a problem for ecosystems? They greatly disrupt existing food webs.
They introduce a new species to the region.
Most ecosystems support only a few different species.
Invasive species rarely survive in new ecosystems.

A) they greatly disrupt existing food webs.

Explanation:

Invasive species change the food web in an ecosystem by destroying or replacing native food sources.

Invasive species are harmful to our natural resources (fish, wildlife, plants and overall ecosystem health) because they disrupt natural communities and ecological processes. ... The invasive species can outcompete the native species for food and habitats and sometimes even cause their extinction.

Explanation:

answer; the above statement is (true);

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