When prey is abundant, predator populations increase because more young are able to survive. More predators kill more prey, which, along with food scarcity, decreases the population. When prey becomes more scarce, the predator population declines until prey is again more abundant. Therefore, the two balance each other.
A. Carbon
It's carbon because it is in all plants and fossil fuels. Hope this helps and is correct.
You can tell that water is evaporating by measuring how much you have left in the container
If you star an experiment with 20ml of water and a few hours later there are 17ml you know 3ml of water evaporated
