Which of the following is not a reason that nonnative species are reared outside their native ecosystems?

a.

they are commercially important.

b.

they are used to replace native species.

c.

they are used for restocking programs.

d.

none of the above

d. None of the above

Explanation: A non-native species is the one which is either intentionally or accidentally introduced to a new habitat. The reason that non-native species are reared outside their native ecosystem can anyone of the given statements like they are commercially important they are brought from their native land, they are used to replace the native species, and they are used for restocking programs. Therefore, none of the above is the relevant answer.