What's the exact title of the course where you find the questions hard to understand?
It would also be helpful to know which Unit and Lesson you're on.

Does it help you to look through the Answers to the Top Voted Questions?  They often have helpful explanations.

If you have a specific question on a video or article, are you able to ask a Question under that video or article?

~ Janice (a KA user)

Ohh