The most accurate response regarding Tarzan's behavior toward Jane in chapter 18, which demonstrates his evolving understanding of human emotions and social norms, is:
A) He is initially driven by primal instincts and curiosity, but gradually develops a sense of respect and deep admiration for her.
This option highlights Tarzan's transformation as he moves from a purely instinctual approach to recognizing and valuing Jane as a person, which signifies his growth in understanding human relationships.