Many skills and life patterns, which are key components for self-sufficiency, are formed during this period.
( ( ( ( ( Many ( skills ( and ( life patterns ) ) ) ) , ) ( which ( are ( ( key components ) ( for self-sufficiency ) ) ) ) ) , ) ( ( are ( formed ( during ( this period ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Many) (NNS skills) (CC and) (NN life) (NNS patterns)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (NP (NP (JJ key) (NNS components)) (PP (IN for) (NP (NN self-sufficiency))))))) (, ,)) (VP (VBP are) (VP (VBN formed) (PP (IN during) (NP (DT this) (NN period))))) (. .)))
Self sufficiency are usually formed during the teenage years of a person's life. 
( Self ( sufficiency ( ( ( are usually ) ( formed ( during ( ( the ( teenage years ) ) ( of ( ( a ( person 's ) ) life ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Self)) (ADVP (RB sufficiency)) (VP (VBP are) (ADVP (RB usually)) (VP (VBN formed) (PP (IN during) (NP (NP (DT the) (JJ teenage) (NNS years)) (PP (IN of) (NP (NP (DT a) (NN person) (POS 's)) (NN life))))))) (. .)))