Which of the following fabrics is often used to make athletic wear due to its breathability and moisture-wicking properties?

Spandex is often used to make athletic wear primarily due to its breathability and moisture-wicking properties, which enhance comfort during physical activity. This fabric is known for its ability to stretch, allowing for a full range of motion, which is essential in athletic clothing. Additionally, spandex is often blended with other materials, improving the overall performance of the fabric while ensuring it does not retain moisture, thus keeping the body dry and comfortable during intense workouts.

Denim, while durable, does not offer the moisture-wicking capabilities or breathability required for high-performance athletic wear. Cotton is breathable and comfortable but tends to retain moisture, making it less suitable for intense physical activities, as it can become heavy and damp. Wool is known for its thermal properties and moisture absorption but can be too warm for athletic wear and is generally not ideal for high-intensity workouts. Therefore, spandex stands out as the most appropriate choice for athletic apparel.