Living organisms are living objects made partly from protein and their study is called Biology. The protein is made from a sequence of amino acid, which is determined by DNA.
Christians believe that humans are the best organisms, 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.
Hindus believe that animals are good organisms, because they have a nervous system. However, many animals don't have a nervous system.
Living organisms developed out of non-living material, see Abiogenesis.