( ( As ( ( the population ) grows ) ) ( , ( ( ( competition ( for ( the ( same ( limited resources ) ) ) ) ) ( -LRB- ( food -RRB- ) ) ) ( increases . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (DT the) (NN population)) (VP (VBZ grows)))) (, ,) (NP (NP (NP (NN competition)) (PP (IN for) (NP (DT the) (JJ same) (JJ limited) (NNS resources)))) (PRN (-LRB- -LRB-) (NP (NN food)) (-RRB- -RRB-))) (VP (VBZ increases)) (. .)))
As the population grows, competition for the same limited resources (food) increases.
(ROOT (S (SBAR (IN As) (S (NP (DT the) (NN population)) (VP (VBZ grows)))) (, ,) (NP (NP (NN competition)) (PP (IN for) (NP (NN food)))) (VP (VBZ grows)) (. .)))