Question

What is the influence of symbolism in these lines from Moby-wingspan by Herman Melville?
Two enormous wooden pots painted black, and suspended by asses' ears, swung from the cross-trees of an old top-mast, planted in front of an old doorway. The horns of the cross-trees were sawed off on the other side, so that this old top-mast looked not a little like a gallows.

It creates a sense of foreboding.

It suggests inhumanity.

It emphasizes barbarism.

It emphasizes imagination.