( ( One answer ) ( ( is ( that ( humans ( have ( rights ( because ( they ( belong ( to ( the ( species ( Homo Sapiens ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD One) (NN answer)) (VP (VBZ is) (SBAR (IN that) (S (NP (NNS humans)) (VP (VBP have) (NP (NP (NNS rights)) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP belong) (PP (TO to) (NP (DT the) (NN species) (NN Homo) (NNP Sapiens))))))))))) (. .)))
One answer is that humans have rights because they belong to the species Homo Sapiens.
(ROOT (S (NP (NNS Humans)) (VP (VBP belong) (PP (TO to) (NP (DT the) (NN species) (NN homo) (NN sapiens)))) (. .)))