1.) the most closely related above are the dolphin and the fish. this is because they are in the same kingdom, phylum, class, order, and family. because the specific names of the organisms are not listed, that is as specific as i can get.
2.) the wolf is the least related to all of the rest of them because it is in a different class. class- mammal, bird, fish, insect, reptile, amphibian, etc.