( ( The light ) ( ( is ( scattered ( by ( ( the ( ( molecules and ) particles ) ) ( that ( are ( composing ( the air ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN light)) (VP (VBZ is) (VP (VBN scattered) (PP (IN by) (NP (NP (DT the) (NNS molecules) (CC and) (NNS particles)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBG composing) (NP (DT the) (NN air)))))))))) (. .)))
The light is scattered by the molecules and particles that are composing the air.
(ROOT (S (NP (NNP Light)) (VP (VBZ is) (VP (VBN scattered) (PP (IN from) (NP (NP (NNS molecules)) (PP (IN in) (NP (PRP$ our) (NN atmosphere))))))) (. .)))