The trick to understanding evolution is less about finding good answer to questions, but rather, finding good questions to answer.
Read that sentence twice, because it is very important.
Years ago, Niko Tinbergen developed a method of formulating questions about biology. I'm pretty sure the Tinbergenian method has not been integrated into most science standards and teaching curriculum. It should be.
There are four types of questions one could formulate about a biological system, trait, or observation.