Find the error with subject-verb agreement. Select the incorrect verb and type it correctly. Goffin's cockatoo a highly intelligent species native to Indonesia are adept at learning new skills by observing other birds

use" is" in place of "are"

Explanation:

According to subject verb agreement rule of English grammar subject and the verb associated with it should agree in number i. e singular subject should take singular verb and plural verb will be used when subject is plural.

Here subject is Goffin's cockatoo which is a singular noun hence "is" is the correct verb to be used with this subject while "are" is used and should be replaced with "is".