The following sentence has been divided into parts. One of them may contain an error.
Select the part that contains the error from the given options. If you don’t find any error, mark ‘No error’ as your answer.
The fisheries sector / have grown significantly / in the last one year.

The correct option containing the grammatical error is "have grown significantly".

Step-by-step Explanation:
1. Identify the Subject: The subject of the sentence is "The fisheries sector". In this noun phrase, "sector" is the main noun (head noun), which is singular. The word "fisheries" acts as an attributive modifier.
2. Determine Subject-Verb Agreement: A fundamental rule of grammar is that a singular subject requires a singular verb, while a plural subject requires a plural verb.
3. Analyze the Auxiliary Verb: The sentence uses the verb phrase "have grown". The auxiliary verb "have" is plural, which violates subject-verb agreement because the subject "sector" is singular.
4. Identify the Correction: The plural auxiliary verb "have" should be replaced with the singular auxiliary verb "has" to match the singular subject.

Thus, the grammatically correct sentence is: "The fisheries sector has grown significantly in the last one year."