Sandcastles crumble under crashing waves.
Meaning: The sentence describes how sandcastles that are built on the beach are destroyed by the waves of the ocean.
Choice of Words: Sandcastles are structures made of sand, typically built by children at the beach. Crumble means to break into small pieces. Under means beneath or below something. Crashing means colliding with something with great force. Waves are large bodies of water that move in a rhythmic pattern.
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