<span>A pedal steel guitar uses foot pedals and knee levers. It </span>allows the player to change pitches with his feet and knees (apex). <span>A pedal (or foot pedal) is something you can use if you want to alter the sound coming from your guitar or add various sound effects.</span>
A lipid molecule primarily is used as a storage mechanism for the cell as ATP doesn't last very long before degenerating.
The answer would NOT be B for this question.
Knowing myself the answer would be A because nuclear energy would be an alternate source of energy unlike natural gas.