Orgamisms are biotic objects made from protein. The pprotein is made from a sequence of amino acid, which is determined by DNA.
Christians believe that humans are the best organism, because they are the smartest and teh bible says they are made in god's image. However humans will just evolve into another organism which is smarter.
Hindu's believe that animals are the best organism, because they have a nervous system. However, many animals don't have a nervous system. Spirtually speaking, a soul can inhabit anything, whether it be a plant, fungus, abiotic, or imaginary.