Request clarification

A move which applies when some of the input has been understood . It has basically the form of questions, but can be also an imperative i.e., it can be an action directive

Examples:
-What do you mean by F (F a formula)?
-What should the x represent?
-What does that mean?
-Is that the answer to my question or a new attempt at a solution?
-Please explain your step more precisely!