Question

what is an example of an invasive species? beaver zebra mussel wolf all of these

Explanation:

Invasive species are non - native organisms that cause harm to the ecosystem they invade. Zebra mussels are well - known invasive species, often introduced to new water bodies accidentally (e.g., via ship ballast water) and they outcompete native species, clog water intake pipes, etc. Beavers are native to many North American ecosystems and play a constructive role in shaping habitats (though they can be considered a nuisance in some human - dominated areas, they are not typically classified as invasive in their native range). Wolves are native predators in many ecosystems and are important for maintaining ecological balance. So only zebra mussel is a clear example of an invasive species among the options.

Answer:

B. Zebra mussel