It rains, water moves and erodes the land and creates valleys and rivers.
It is between A and B.
But if the species is going to be extinct, that means that they are being threatened.
So the answer is B.
Answer: B
Explanation:
Ammonia is so toxic that it can be transported and excreted only in large volumes of very dilute solution. As a result most terrestrial animals simply don't have access to sufficient water to routine excrete ammonia.
The main advantage of urea is its very low toxicity. Animals can transport urea in the circulatory system and store it safely in high concentrations. Also much less water is loss when a given quantity of nitrogen is excreted in a concentrated solution of urea than would be in a dilute solution of ammonia.
This is potential energy because while he was aiming at a bull's eye target, he is storing energy
