complicated

My science teacher gave us a complicated project with many different parts. Mrs. Smartz wants us to create an entirely new world—now that’s a complicated assignment! I have to figure out so many things, such as the planet’s weather, how much water and land it has, and what kinds of animals live there. And there are even more questions to answer: do the people use money, what are their rules, and what sources of power do they have? The more I think about it, the more complicated or hard to understand this project seems—I think I’ll need the entire year to complete it!

Quiz: Try again! What is an aspect of a complicated problem?

• It is easy to solve.
• It is impossible to solve.
• It is hard to solve.

• "The Neanderthal story can no longer be told as a European story only. It’s a much more complicated story," said Hershkovitz. — ABC News
• The thing is, the immune system is very complicated. Arguably the most complex part of the human body outside the brain, it’s an absurdly intricate network of cells and molecules that protect us from dangerous viruses and other microbes. — The Atlantic