They have helped the united states,africa,and asia just to name a few.
<span>a division or contrast between two things that are or are represented as being opposed or entirely different.
or
contrast, difference</span>
The central idea is what the main thing. For this, I think the central idea is simply Cactuses.
I'm not sure what another supporting detail can be, but if there's a back side, or another page about cactuses, I can sure help! But if that's the only side, ask your parents. xD
