It would be c. It can bond with other atoms through ionic and covenant bonds.<span />
The potential energy changes into kinetic energy. :)
The coronary arteries supply oxygen to The heart muscle
I mean each Animal has a purpose in order to keep the food chain in line, for example sharks if they went extinct there would be more seals and more fish and less of this and that. Each animal plays a certain part on earth in order to keep everything normal.
Oxygen is the answer for this question.