Show them a glass of water.
<span>tell them that the water is obviously in 3d because its not flat. Because this water takes up space in this glass it has a volume </span>
<span>Say anything that's 3d has a volume, even a 3d movie possibly. I know SPY KIDS 3 came out and some of the characters or things would jump off the screen. Since they aren't flat like a normal tv they have a volume</span>
Because the earth is in an angle so the northern hemisphere receives more heat and vice versa
I believe it would be B. More than a year (Since it is a slow change, and that is the longest amount of time). Hopefully this helps