Plants can use the fixed nitrogen in the ground to help them grow.
Surface water changes into a gas and enters the atmosphere.
I would go with C) food because food gives us energy, healthy veggies gives us energy and unhealthy junk food really doesn't give us as much energy and makes us fat. Not air because air is the need for life, not energy and not a place to live since that really doesn't give us energy.
Answer:
Either A or C but A is a bit more true
Explanation:
You can measure one on option C but you can measure both
on answer A. Hope this helps you out.
Well, if the big fish are predators, then more food for them and their population would increase greatly. If the big fish and small fish have the same type of food, then that means that the big fish, hypothetically, would have millions of new contenders for their food source. That means that it's very likely that many of those big fish would die out.
