Concept:Gender stereotyping means assigning fixed roles and behaviors to each gender based on societal norms. Parents often reinforce these norms by expecting their children to follow traditional gender roles.Explanation:Gender is a social construct, not biological. Stereotyping happens when people assume that all boys or all girls must act a certain way. Parents assist by consciously or unconsciously making children obey these pre-set gender expectations. For example, they may buy only "girl" toys for daughters and "boy" toys for sons. This forces children to adopt traditional roles, which affects their social, emotional, and cognitive growth. Option A and B involve peers and schools, not parents directly. Option C is about school choice, not active forcing. Thus, the most direct way parents assist is by forcing traditional gender roles.Answer:D. Parents force children to follow traditional gender roles.