(a) Definitions As used in this rule, (1) "Motion" refers to either a motion for summary judgment or a motion for summary adjudication. (2) "Material facts" are facts that relate to the cause of action, claim for damages, issue of duty, or affirmative defense that is the subject of the motion and that could make a difference in the disposition of the motion. (Subd (a) amended effective January 1, 2016.) (b) Motion for summary adjudication If made in the alternative, a motion for summary adjudication