Final answer:
The correct micronutrient to help with difficulty seeing at night is Vitamin A. Vitamins play vital roles in maintaining health, and Vitamin A is specifically crucial for vision. It can be found in various foods like carrots, sweet potatoes, and leafy greens.
Step-by-step explanation:
A nurse is teaching about increasing dietary intake of micronutrients to a client who has difficulty seeing at night. The micronutrient that should be included in this teaching is Vitamin A.
Vitamins are organic compounds that are necessary for various bodily functions. Vitamin A is particularly important for maintaining good vision, including night vision. It is essential for the formation of rhodopsin, a pigment in the retina that is required for sight in low-light conditions. It should be noted that, unlike Vitamin A, Calcium, Vitamin B12, and Phosphorus do not play a direct role in improving vision.
Therefore, the correct micronutrient to increase in the diet for a person having difficulty seeing at night is Vitamin A. This vitamin can be found in foods such as carrots, sweet potatoes, spinach, and other leafy green vegetables, as well as in animal products like liver, fish oils, and dairy products.