Wind power is a renewable resource as it is easily replenished within due course of time. It is used to generate electricity. For this, it uses large turbines which consist of mechanical device called the propeller. This device rotates with high speed in order to push against air. This creates sound waves which cause considerable effects in the nearby population. Sound waves may cause headache, psychological problems, nausea and other harmful effects.
The cell membrane helps to control what enters and leaves a cell. The substance which accounts for two-thirds of a cells mass is water. That makes the answer D.
