( So ( , ( ( an animal ) ( ( can ( ( ( be ( ( ( ( ( ( a primary ) , ) secondary ) , ) or ) ( ( even ( a ( tertiary consumer ) ) ) ( in ( a ( food chain ) ) ) ) ) ) , ) ( depending ( on ( ( the ( trophic level ) ) ( that ( it ( is ( found at ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB So)) (, ,) (NP (DT an) (NN animal)) (VP (MD can) (VP (VB be) (NP (NP (DT a) (NN primary)) (, ,) (NP (JJ secondary)) (, ,) (CC or) (NP (NP (RB even) (DT a) (JJ tertiary) (NN consumer)) (PP (IN in) (NP (DT a) (NN food) (NN chain))))) (, ,) (PP (VBG depending) (PP (IN on) (NP (NP (DT the) (JJ trophic) (NN level)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN found) (PP (IN at))))))))))) (. .)))
So, an animal can be a primary, secondary, or even a tertiary consumer in a food chain, depending on the trophic level that it is found at.
(ROOT (S (NP (NP (JJ Secondary) (NNS consumers)) (PRN (-LRB- -LRB-) (SBAR (WHNP (WDT which)) (S (VP (VBP eat) (NP (JJ primary) (NNS consumers))))) (-RRB- -RRB-))) (VP (VBP are) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (ADJP (JJ trophic) (NP (NN level) (CD 3)))))))) (. .)))