( ( Crust ( of ( the ocean ) ) ) ( ( is ( younger ( than ( that ( of ( ( the continent ) ( due ( to ( seafloor spreading ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Crust)) (PP (IN of) (NP (DT the) (NN ocean)))) (VP (VBZ is) (NP (NP (JJR younger)) (PP (IN than) (NP (NP (DT that)) (PP (IN of) (NP (NP (DT the) (NN continent)) (ADJP (JJ due) (S (VP (TO to) (VP (VB seafloor) (S (VP (VBG spreading))))))))))))) (. .)))
Crust of the ocean is younger than that of the continent due to seafloor spreading.
(ROOT (S (NP (NP (DT The) (NN creation) (CC and) (NN destruction)) (PP (IN of) (NP (JJ oceanic) (NN crust)))) (VP (VBZ is) (NP (DT the) (NN reason) (NN continents) (NN move))) (. .)))