Which of the following depicts a nutrient deficiency?

A nutrient deficiency occurs when the body does not receive enough of an essential nutrient required for optimal health and functioning. This can result from inadequate intake or absorption of these nutrients, which impairs various bodily processes and can lead to health issues.

The chosen response highlights that when the intake or absorption of essential nutrients is insufficient, the body's needs are not met, leading to deficiency symptoms. For example, a lack of vitamins, minerals, or macronutrients can result in various health problems, such as weakened immune function, fatigue, or stunted growth.

The other options do not accurately represent a nutrient deficiency. The first option suggests an excess of nutrients rather than a deficiency. The third option refers to improper digestion, which may affect nutrient absorption but doesn't inherently indicate that essential nutrients are not being ingested. The fourth option describes a diet that is balanced yet high in calories, which does not necessarily imply a deficiency but rather a potential issue with caloric excess without regard to overall nutrient adequacy. Thus, understanding the specifics of nutrient sufficiency versus deficiency is crucial in nutritional science.