( Fish ( ( can ( ( send signals ) ( by ( ( using ( the electricity ) ) ( in ( their bodies ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Fish)) (VP (MD can) (VP (VB send) (NP (NNS signals)) (PP (IN by) (S (VP (VBG using) (NP (DT the) (NN electricity)) (PP (IN in) (NP (PRP$ their) (NNS bodies)))))))) (. .)))
Fish can send signals by using the electricity in their bodies.
(ROOT (S (NP (NNS Hormones)) (VP (VBP send) (NP (NNS signals)) (PP (IN through) (NP (PRP$ your) (NN body)))) (. .)))