Compare and contrast for example, means to tell what features of the data or concepts are similar and what features are different. Both the similarities and differences must be included in the correct answer. Discuss in detail means to state what the concept is, how it works and why its important. Basically, tell me everything you've learned about the concept. Discuss by example means to state what the concept is and use an example to explain how the concept works.
List means to simply jot down in non-sentence form the items that are requested.
A complete explanation will also include the data and concept. Describe means to state the characteristics or components of the concept or idea. Answering multiple questions. Read the leading question or statement carefully. Underline what is that you are asked to choose.