Question

select the correct answer from each drop - down menu. a hydrogen fuel cell is more efficient than a combustion reaction because very little of the released energy is released as heat. when used at home, a fuel cell eliminates the need for drop - down menu with options: oxygen, hydrogen, an electrical grid because the cell is portable.

Explanation:

Hydrogen fuel cells can generate electricity directly and when used at home can provide power independently, reducing reliance on an external electrical grid.

Answer:

an electrical grid