Final answer:
Social marketing is the approach that organizations trying to market healthier diets and eating habits are most likely to use.
Step-by-step explanation:
Organizations trying to market healthier diets and eating habits are most likely to use Social marketing. Social marketing is an approach that aims to change behaviors and promote socially beneficial causes. In the context of promoting healthier diets and eating habits, social marketing campaigns may include educational campaigns, public service announcements, and community engagement activities to raise awareness and encourage individuals to make healthier choices.