So whats the answer. My best logical guess is D. Why would the turtle have to go above the water. If their living in a pond, then studying them above water makes no sense. So it's most useful if they are remaining underwater for many minutes at a time then reach for the surface, so that's the answer most likely, but i have no idea.
So... <em>D. A turtle may remain underwater for several minutes, but then surfaces for at least a brief moment.</em>
Im not really sure what you mean by this but, from what I get, we all humans, animals, and plants need oxygen and food to survive. tree are very important cause we need them to give us oxygen, and we need animals or plants to have food. Hope this is what you were looking for.
A chemical change or it also can be named a chemical reaction
The answer is: contribute to ozone depletion.
CFC (chlorofluorocarbon), including freon, is used as the aerosol propellant. <span>An aerosol is a suspension in the gaseous form of solid or liquid particles. when these compounds reach the stratosphere, UV light affects them and they release chlorine atoms. Chlorine atoms are capable of breaking down ozone molecules. With fewer ozone molecules, the ozone layer becomes thinner and harmful UV light passes through it. </span>
