(2) Sea Level
It's not just the length of the poem that makes it relatively easy for us to digest. It's also the language and the ease with which the speaker tells the poem. The words aren't too daunting, and since it's free verse, we don't feel bogged down by all the literary devices that come with some more technical types of form and meter. We can just dig the cat-fog and let our imaginations take it from there.