( It ( ( ( is ( ( a ( good tracer ) ) ( for ( this process ) ) ) ) ( as ( it ( ( is ( more easily ) ) ( observed ( than ( other ( potential elements ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (JJ good) (NN tracer)) (PP (IN for) (NP (DT this) (NN process)))) (SBAR (IN as) (S (NP (PRP it)) (VP (VBZ is) (ADVP (RBR more) (RB easily)) (VP (VBN observed) (PP (IN than) (NP (JJ other) (JJ potential) (NNS elements)))))))) (. .)))
It is a good tracer for this process as it is more easily observed than other potential elements.
(ROOT (S (NP (JJ Reactive) (NNS elements)) (VP (VBP are) (ADJP (JJ able) (S (VP (TO to) (VP (VB combine) (ADVP (RBR more) (RB easily)) (PP (IN with) (NP (JJ other) (NNS elements)))))))) (. .)))