Which would provide the body with the most energy?

1. breaking a simple carbon bond
2.carrying oxygen from the lungs to the cells
3. creating bonds to make a simple sugar
4. breaking bonds in a disaccharide

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

idk why hjggjhjkhj