Which of the following is a benefit of pruning plants?

Pruning plants is an essential practice in horticulture and gardening for several reasons, with one of the key benefits being its ability to improve air circulation. When plants are pruned, excess foliage is removed. This thinning out allows air to flow more freely through the plant's structure, reducing humidity around the leaves and stems. Improved air circulation helps to prevent the development of diseases that thrive in damp, stagnant conditions, such as mold and mildew. Additionally, enhanced airflow can support overall plant health and growth, enabling better photosynthesis and reducing stress on the plants.

The other options highlight disadvantages rather than benefits. Decreasing air circulation and limiting sunlight exposure can lead to poor plant health and increased susceptibility to diseases. Reducing nutrient uptake is also counterproductive since a healthy plant relies on optimal nutrient absorption for growth and development. Thus, the emphasis on improved air circulation distinctly encapsulates one of the most vital advantages of proper pruning techniques.