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If you are a being made out of 3 dimensions, then the world has 3 dimensions as well and every other creature too.
But if you can imagine creatures made out of 2 dimensions or 4 dimensions or any number of dimensions (11 in string theory), then hurray, ‘cause the world has also those 2 dimensions or 4 dimensions or any number of dimensions (still 11 in string theory).
Because, dimensions are unavoidable, so they are what there is. All of it.