Which two characteristics are basic parts of a literary analysis essay about a play?

Everything you need to make clearly organized analysis with expanded thought is primary and secondary sources connected with the play. The first characteristic, primary sources, should include exact information, especially dry facts such as data, result of specific experiment or event, I mean the information from which you can make a start. And what about  the last one, secondary sources make you able to summarise main points of the plot, describe, compare, analyze them.

The answer is