0_Apprentice
I just love the beach do you know anything about it's coral reefs?
1_Wizard
well the particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, or cobblestones.
0_Apprentice
Where do those materials come from?  Are they washed up from the ocean?
1_Wizard
they are mostly biological in origin, such as mollusc shells or coraline algae.
0_Apprentice
Do any animals live on the beach?