Question: Compare the key elements of two behavior change theories/models. What are the concepts they have in common, and how do they differ? Also describe briefly (1-2) sentences to your classmates who your target audience is and why they are vulnerable population. What is the role of ethics and impact of health disparities for this population and how it relate to one or both theories you assessed? Be sure to site evidence any time you are stating facts and findings. Want Online Help?