Jack is a college athlete who requires 2,800 kilocalories a day to support his total energy needs. even though jack likes many different foods and makes it a point to try new things, he consumes only approximately 1,600 kilocalories a day. which one of these characteristics of a healthful diet is jack missing?

Nutritional Adequacy

Explanation:

Based on the information provided within the question it can be said that in this scenario Jack is missing the characteristic of Nutritional Adequacy. This term refers to taking in the sufficient amount of nutrients that is necessary, depending on the individual's weight, gender, and height, and age. Which Jack is apparently missing since he needs an intake of 2,800 kilo-calories a day and is only taking in 1,600 Kilo-calories a day.