The response that is NOT an example of a keystone species is:
B. kudzu; kudzu was introduced from Japan as an ornamental plant, and the Civilian Conservation Corps used it to help reduce soil erosion.
Kudzu is considered an invasive species rather than a keystone species. It disrupts local ecosystems by outcompeting native plants, which can lead to a decrease in biodiversity and negatively impact the stability of the ecosystem. In contrast, beavers, alligators, and red-cockaded woodpeckers all play crucial roles in their respective ecosystems, helping to maintain stability and support other species.