The answer should be A, as anorexia nervosa is when someone worries far too much about their weight and begin to eat far less, becoming severely underweight.
Its main purpose is to restore partial flow of oxygenated blood to the brain and heart. ♥
It is D, sharing appreciation for what is being said. Both A and B aren't crucial to being a good listener, in fact in practice they effectively draw attention to yourself, which would be fine if the question was regarding being a good conversationalist. Additionally, C is just completely irrelevant, that wouldn't even be a good conversation practice, let alone a trait important to listening.
Your circulatory and respiratory systems
Three services offered by school health services are:
- Emergency care
- Health education
- Speech, vision, hearing