1. What do folk tales and fables have in common?

They often tend to deal with similar fantastical subjects, and often both have moral lessons.

Explanation:

Many people consider folktales and fables as part of the same body of tales which forms the oral and written heritage of a culture. They often tend to deal with similar fantastical subjects, and often both have moral lessons.

Explanation:

dependent clause!

example: "before the food gets cold"