The water droplet evaporates more quickly or has a shorter lifetime when _________________________.

The rate of evaporation of water droplets is influenced by environmental conditions, particularly relative humidity and temperature. When relative humidity is low, the air is less saturated with moisture, allowing water droplets to evaporate more quickly. This is because there is a greater difference between the moisture content of the air and the moisture in the droplet, facilitating faster evaporation.

Additionally, higher temperatures increase the kinetic energy of water molecules, making them more likely to escape the liquid phase and enter the vapor phase. As the temperature rises, the energy available to water molecules increases, which also contributes to a shorter lifetime for the droplet.

Therefore, both low relative humidity and higher temperatures combine to significantly reduce the duration a water droplet remains in liquid form. This makes the statement that water droplets evaporate more quickly when conditions are characterized by low relative humidity and higher temperatures accurate. Thus, the correct answer encompasses both conditions as they work synergistically to enhance the evaporation rate.