Answer:
Well get facts to support it and the facts need to be proven and real. So if we are talking about that Children Have a small attention span it can be supported by articles saying that, you want facts behind it you want it to be proven so some tests that have been done by people who are verified that helps support it. You do not want to make anything up or guess you support should be firm, logical and proven if possible
Explanation:
Hope this helps
