Which action for healthier eating should be placed in the missing box? draft a list of three healthy goals to achieve in three months. write a list of favorite foods to eat on unhealthy eating days. create a meal plan that does not meet minimum nutritional values. construct a schedule that reduces running days from three to two.

I would say that the answer is Draft a list of three healthy goals to achieve in three months.

Let's break down the other options to see why they are incorrect.

Writing a list of your favorite foods to eat on your unhealthy eating days, or "cheat" days, is just setting yourself up for failure. You are drafting a list of the unhealthy things you want to do instead of making a plan to eat healthier.

Creating a meal plan that doesn't meet minimum nutritional values is the worst thing you can do for yourself. Nutritional values are the things that keep you going and give your body the energy it needs to go on. If you do not get the nutrition you need, you will meet a lot more health issues than you would if you just eat healthy.

Reducing your running days from three to two isn't so bad, however, it doesn't fit with the question of eating healthier. It doesn't relate directly to healthy eating. 

Making healthy eating goals is by and large the best course of action. If you create a plan to eat healthy and stick to it, you will eventually find yourself feeling healthier than ever!