The document discusses WH questions, which use question words starting with WH (e.g. why, how, where) to gather information. It provides examples of different WH questions based on the question word used, including what questions for things/objects, who questions for people, when questions for time, where questions for place, why questions for reasons, which questions for choices, and how/how many questions. Common WH question words are defined and examples are given for each type of question.