The answer will be the A coal.
The energy in coal comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests. After some time dirt and water started to stack compressing it to rock or also known as coal.
Cell membrane is a thin line.it controls the movement of materials into and out of the cell. it is partially permeable,that is,it allows only certain materials to pass through.
Flash floods will be the correct answer
