what is the part of speech of ‘round’ here?

[Mitra584]

Dear teachers and friends,
Would you please explain me what is the part of speech of ‘round’ in this sentence?'There is a yellow fence round the bicycle park’. Is it preposition or....and also what word does replace instead of it?
In advance, thank you very much
Mitra


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Peace&Love

[Alabzero]

nice pic

[Beeesneees]

'round' here is the same as 'around' and is a preposition.
The adverb 'about' might replace it.
Alternatively you could write, "There is a yellow fence surrounding the bicycle park.'
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Cheers m' dears!