Explanation:

- Original Sentence: The community members as well as teachers are presently into the bus station.

- Issues with Original: The use of "into" is incorrect for indicating someone's presence at a location.

- Option 1: "are presently on" – This implies being on top of the bus station, which doesn't fit the context.

- Option 2: "are present at" – This is correct as it indicates being located at the bus station.

- Option 3: "No improvement required" – Incorrect, as the original sentence is grammatically flawed.

- Option 4: "is present at" – Incorrect, as it uses a singular verb form "is" which doesn't agree with the plural subject "community members as well as teachers."

Your Answer: are present at