( ( ( The number ) ( of ( rabbits ( in ( a ( given area ) ) ) ) ) ) ( ( will ( ( increase and ) ( decrease ( in ( ( a cycle ) ( connected ( with ( ( ( predator populations ) and ) ( food availability ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN number)) (PP (IN of) (NP (NP (NNS rabbits)) (PP (IN in) (NP (DT a) (VBN given) (NN area)))))) (VP (MD will) (VP (VP (VB increase)) (CC and) (VP (VB decrease) (PP (IN in) (NP (NP (DT a) (NN cycle)) (VP (VBN connected) (PP (IN with) (NP (NP (NN predator) (NNS populations)) (CC and) (NP (NN food) (NN availability)))))))))) (. .)))
The number of rabbits in a   given area will increase and decrease in a cycle connected with predator   populations and food availability.
(ROOT (S (NP (DT A) (JJR fewer) (NNS predators)) (VP (VBZ is) (ADJP (RBS most) (JJ likely) (S (VP (TO to) (VP (VB cause) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS rabbits)) (VP (VBG living) (PP (IN in) (NP (DT an) (NN area))) (S (VP (TO to) (VP (VB increase))))))))))))) (. .)))
A fewer predators is most likely to cause the number of rabbits living in an area to increase.