Final answer:
Certified Dietitian Consultation would be the most suitable avenue for getting nutrition help from a professional.
Step-by-step explanation:
When creating a presentation about getting nutrition help from a professional who can teach about diet and its effects on the body, the most suitable avenue for this kind of assistance would be Certified Dietitian Consultation. Certified dietitians are healthcare professionals who help plan nutrition programs for individuals in various settings, such as health care facilities, nursing homes, schools, and private practices. They have the expertise and knowledge to provide accurate and personalized guidance on diet and its effects on the body, making them the most reliable source for nutrition assistance.