Final answer:
In the context of a healthy diet, a variety of foods is considered healthy because it ensures a balance of essential nutrients and makes eating a more enjoyable experience.
Step-by-step explanation:
A variety of foods is healthy. Variety in a diet entails including different foods from all the food groups, which ensures that sufficient amounts of all essential nutrients required for good health are consumed. Eating various whole foods over processed options provides critical vitamins, minerals, protein, carbohydrates, fats, and fiber that promote health.
On the other hand, a monotonous diet can lead to nutrient imbalances. Given that foods also vary in textures and flavors, a diverse diet can be both nutritionally rewarding and visually and gustatorily appealing, enhancing the overall eating experience.