( ( Positive feedback ) ( ( ( ( is ( ( an example ) ( of ( Nature ( undergoing ( ( more drastic ) change ) ) ) ) ) ) , ) ( since ( ( positive feedbacks ) ( act ( ( ( ( to ( enhance ( ( the changes ) ( which ( are occuring ) ) ) ) ) , ) ( rather than ) ) ( to ( suppress them ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (NP (NNP Nature)) (VP (VBG undergoing) (NP (ADJP (RBR more) (JJ drastic)) (NN change)))))) (, ,) (SBAR (IN since) (S (NP (JJ positive) (NNS feedbacks)) (VP (VBP act) (S (VP (VP (TO to) (VP (VB enhance) (NP (NP (DT the) (NNS changes)) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (VP (VBG occuring)))))))) (, ,) (CONJP (RB rather) (IN than)) (VP (TO to) (VP (VB suppress) (NP (PRP them)))))))))) (. .)))
Positive feedback is an example of Nature undergoing more drastic change, since positive feedbacks act to enhance the changes which are occuring, rather than to suppress them.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))