Concept:Alternative conceptions are students' incorrect prior beliefs that differ from accepted scientific ideas. They are not useless or illogical but reflect students' attempts to understand new information.Explanation:These ideas come from daily life, culture, or past learning. They may be wrong but are often logical within the student's own thinking. Teachers should identify and address them, not ignore them. Alternative conceptions are called 'naive' theories because they are based on incomplete or faulty reasoning. For example, a child might think the sun moves around the Earth. This is not random or irrational; it is a simple explanation based on observation. Thus, such conceptions represent students' natural attempts to make sense of the world.Answer:C. represent students' 'naive' theories.