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
Explanation:
A recent study by the U.S. Department of Education suggests that school uniforms can help reduce theft, violence, and the negative effects of peer pressure caused when some students come to school wearing designer clothing and expensive sneakers. ... Less than 1 percent of the students chose not to wear uniforms.
Answer:
what is this subject and language?
I think when giving directions