( they ( ( have ( a ( characteristic ( , ( strong ( , ( aromatic odor ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (PRP they)) (VP (VBP have) (NP (DT a) (JJ characteristic) (, ,) (JJ strong) (, ,) (JJ aromatic) (NN odor))) (: ;)))
they have a characteristic, strong, aromatic odor;
(ROOT (S (NP (JJ Strong) (NN odor)) (VP (VBZ helps) (S (NP (DT some) (NNS animals)) (VP (VB defend) (NP (PRP themselves)) (PP (IN against) (NP (NNS predators)))))) (. .)))
Strong odor helps some animals defend themselves against predators.