Why does the aquarium trade contribute to the introduction of nonnative species?

a. Exotic species can escape or be released into local ecosystems.

b. Aquarium owners do not always understand how ecosystems interact.

c. Nonnative fish are shipped worldwide for aquariums.

d. All of the above

The aquarium trade contribute to the introduction of non native species because:

-Exotic species can escape or be released into local ecosystems.

-Aquarium owners do not always understand how ecosystems interact.

-Nonnative fish are shipped worldwide for aquariums.

The answer then is letter D. All of the above.