Find out which part of the sentence has an error.

The captain along with his team are practicing very hard for the forthcoming matches.

are practicing very hard

The correct answer is Option (2) - are practicing very hard

The part of the sentence with the error is: are practicing very hard

The subject of the sentence is "The captain", and "along with his team" is a prepositional phrase that does not affect the number of the subject. Therefore, the verb should agree with the singular subject "The captain."

The correct verb form should be "is practicing very hard."

So, the corrected sentence is:

The captain, along with his team, is practicing very hard for the forthcoming matches.