The correct answer is hazard. It is a situation that poses a level of threat to life, health, property, or environment. Hazards are also very harmful to living things. Once a hazard is active, it creates an emergency.
D) jump rope, you’re using your calves and maybe a little bit of quads when jumping rope so this is probably the right answer hope this helps
Vitamin? if so they're all very important because they provide the body with different things like nutrients or they help systems throughout your body none are truly more superior then another.