Final answer:
High humidity levels lead to reduced evaporation rates as the air contains more water vapor and thus has a lower capacity to absorb more moisture. This condition accelerates condensation and precipitation as the saturated air will release excess moisture more readily.
Step-by-step explanation:
The question 'How does humidity affect the movement of the water cycle?' is looking at the influence of humidity on various phases of the water cycle. When humidity levels are high, the air already contains a significant amount of water vapor, which leads to reduced evaporation rates because the difference in water vapor pressure between the surface (such as a leaf or soil) and the atmosphere decreases.
Consequently, this reduced evaporation can accelerate the processes of condensation and precipitation because the air cannot hold additional moisture, prompting the excess water vapor to condense into clouds and eventually fall as precipitation.