Question

the speaker requested to the people to be seated[correct the preposition if required]​

Answer 1

The speaker requested the people to be seated.

The prepostition "to" after the word requested is incorrect.

The correct use of prepositions

• Prepositions play a vital role in the completion of sentence structure.
• We use these words before nouns or proper nouns to link them with the whole sentence.
• These words can also be used to show time, location, and direction.
• Some examples of prepostions are from, upon, by, of, off.

so to will not be used after the word requested.