Final answer:
Beekeepers use white paint and shiny aluminum lids on beehives to reflect sunlight and keep the hives cool, ensuring a healthy environment for the bee colony.
Step-by-step explanation:
The reason beekeepers use white paint and shiny aluminum lids on their bee hives is to reflect sunlight and keep the hives cool, which is option B. The white paint reflects sunlight, preventing the hives from absorbing too much heat, which can be detrimental to the bees inside. Shiny aluminum lids are used for the same purpose: the reflective surface helps to deflect sunlight and reduces heat build-up within the hive. This is crucial for maintaining an environment conducive to the health and productivity of the bee colony.