( ( As ( ( ( days shorten ) and ) ( temperatures decrease ) ) ) ( , ( ( ( ( ( plant activity ) slows ) and ) ( ( requirements ( for ( ( water and ) nutrients ) ) ) diminish ) ) . ) ) )
(ROOT (S (PP (IN As) (NP (NP (NNS days) (NNS shorten)) (CC and) (NP (NNS temperatures) (NN decrease)))) (, ,) (S (NP (NN plant) (NN activity)) (VP (VBZ slows))) (CC and) (S (NP (NP (NNS requirements)) (PP (IN for) (NP (NN water) (CC and) (NNS nutrients)))) (VP (VB diminish))) (. .)))
As days shorten and temperatures decrease, plant activity slows and requirements for water and nutrients diminish.
(ROOT (S (PP (IN As) (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (NN water) (NNS decreases))))) (, ,) (NP (DT the) (NN water) (NNS molecules)) (VP (VB slow) (PRT (RP down))) (. .)))