Which of the following is NOT a factor influencing bee behavior?

Soil composition does not directly influence bee behavior in the same way that temperature, pollen availability, and humidity do. Bees are primarily affected by environmental factors that relate to their immediate habitat and foraging needs.

Temperature, for instance, plays a crucial role in bee activity levels; warmer temperatures can stimulate foraging behavior or affect hive dynamics. Pollen availability is essential for bee nutrition and colony health, influencing foraging patterns and overall colony success. Humidity affects the hive environment and can impact brood development and worker activity.

In contrast, soil composition primarily pertains to plant growth and ecosystem structure rather than directly impacting how bees behave. While it may affect the types of plants that can grow in an area, and hence indirectly influence bee foraging if certain plants are not available, it does not operate on the behavioral level as the other factors do. Therefore, soil composition stands out as the option that does not have a direct effect on bee behavior.