( ( ( ( ( ( Leaf-cutter ( ants ( ( -LRB- ( ( Atta cephalotes ) -RRB- ) ) Defense ) ) ) , ) agriculture ) and ) ( chemical communication ) ) ( ( are ( ( all ( vital elements ) ) ( in ( ( the lives ) ( of ( leaf-cutter ants ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Leaf-cutter) (NNP ants) (PRN (-LRB- -LRB-) (NP (NNP Atta) (NNS cephalotes)) (-RRB- -RRB-)) (NNP Defense)) (, ,) (NP (NN agriculture)) (CC and) (NP (NN chemical) (NN communication))) (VP (VBP are) (NP (NP (DT all) (JJ vital) (NNS elements)) (PP (IN in) (NP (NP (DT the) (NNS lives)) (PP (IN of) (NP (JJ leaf-cutter) (NNS ants))))))) (. .)))
Leaf-cutter ants ( Atta cephalotes ) Defense, agriculture and chemical communication are all vital elements in the  lives of leaf-cutter ants.
(ROOT (S (NP (NNS Pheromones)) (VP (VBP enable) (NP (NP (NN communication)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADJP (JJ vital) (PP (IN for) (NP (NP (NNS organisms)) (PP (IN like) (NP (NP (NNS ants)) (SBAR (WHNP (WDT that)) (S (VP (VBP live) (PP (IN in) (NP (DT a) (JJ large) (NN community)))))))))))))))) (. .)))