2. Use chronological order- tell stories. Don't get too caught up with telling reasons, etc- that's logical division.
3. Stories generally have three parts, and that applies here too. Think about how the blimp and electric car are somewhat similar in terms of their history- they once seemed like they would be the dominant mode of transport, but then each one was outcompeted by a fossil-fuel means of transport. Today, however, due to environmental concerns and the like, each is making a comeback.
Thank you so much !! Just feel free to tell me if you have any questions.