response: Unfortunatelly I don't know anything about coral reefs, all I know is that beaches are composed by particles made from rock, like gravel, sand, pebbles and others
original_response: well the particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, or cobblestones.
history: I just love the beach do you know anything about it's coral reefs?
knowledge: The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, or cobblestones.