Answer:

Introduction
In this question, we are required to identify if there is any error in the sentence "The audience are requested to be in its seats". We need to explain the error, if any, and provide the correct sentence.

Explanation
The given sentence has an error in subject-verb agreement. The subject "audience" is a collective noun, and it is always considered singular. Therefore, the verb "are" is incorrect. The correct verb should be "is".

Correction
The corrected sentence should be: "The audience is requested to be in its seats."

Conclusion
In conclusion, we have identified the error in the given sentence and provided the correct sentence. It is essential to maintain proper subject-verb agreement in sentences to avoid confusion and ensure clarity in communication.