Which factor is critical when handling and maintaining parachutes?

Temperature and humidity are critical factors when handling and maintaining parachutes because these elements can significantly affect the material properties of the parachute fabric and the overall performance of the parachute system. Extreme temperatures can cause deterioration of the materials, leading to reduced strength and increased risk of failure during deployment. High humidity can lead to mold and mildew formation, which can also damage the fabric and harness components. Ensuring that parachutes are stored and maintained within appropriate temperature and humidity ranges is essential for preserving their integrity and ensuring they function correctly when needed. This focus on environmental conditions helps guarantee the safety and effectiveness of parachute operations.