What feature of insects contributes to their quick movement?

The small size of insects plays a crucial role in their ability to move quickly. Being small allows insects to respond rapidly to stimuli, change direction quickly, and maneuver through tight spaces with ease. This agility is facilitated by their lightweight bodies, which reduce inertia and allow for swift acceleration and sudden stops. Additionally, the small size means that their muscles can generate a significant amount of force relative to their body weight, enhancing their movement capabilities. This efficiency in movement is a key factor in their survival, enabling them to evade predators and navigate their environments effectively.