What does sand grab onto to form beaches? bedrock seaweed mollusk shells cracks and fissures in rock

The correct option is option a bedrock.

Explanation- The sand present on the beaches has to stay there and stick to something to form ground.  This ground is the Bedrock present at the beaches which offer a solid grounding over which the sand is held on to.  

If this Bedrock would not have been present and would have some must completely or it would have been really difficult to stand as standing on it would have led to submerging of legs into the sand.  

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

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