What best describes the effect of something that stultifies?

The term "stultifies" refers to the action of causing someone or something to lose enthusiasm, initiative, or effectiveness. When something stultifies, it effectively dulls or diminishes a person's ability to think, create, or engage fully with their environment. Therefore, the effect described as harming creativity accurately reflects the negative outcomes associated with stultifying influences.

In contrast, enhancing abilities, providing opportunities, and encouraging growth imply a positive effect that would foster or support development and creative expression, which is the opposite of what the term "stultifies" conveys.