You are presented with the quiz "What converts chemical energy into electrical energy?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "abattery converts chemical energy into electrical energy" and "check the fire alarm's batteries the first of each month". So, what's the best answer to the question?

Select from:
(a). Something in a fire alarm;
(b). sperm and egg fuse;
(c). Males and females;
(d). igniting fuel and oxidiser;
(e). The bending of a ray of light;
(f). basic building blocks of life;
(g). sensory neurons;
(h). mechanical waves;
Answer:
(a).