Answer:
Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges.
They are called a population, because they are the same species living in a given area. The word population means the amount of a certain species living in a certain environment.
Eek
Answer:
D
Explanation:
Its the only answer that has engineering properties to it. Engineering is primarily structure and mathematics. The rest appear to be biology and geology.
It should be due to the changes in the water temperature and the salinity of the water.
