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 only consumes approximately 1,600 kilocalories a day. which one of the characteristics of a healthy diet is jack missing?

Answer is adequacy [ nutritional adequacy]

Explanation:

Adequate or sufficient consumption of essential nutrients which is required in fulfilling nutritional requirements is known to be adequacy [ nutritional ].

The mean adequacy ratio [MAR] can be calculated as follows

MAR = sum of NAR/ number of nutrients × 100.

Note; NAR is Nutrients adequacy ratio.

when your a dog and you need a bone.   go and eat a rabbit

answer; the president uses mass media to gain support for policies;