Shimmering is a collective defense behavior that researchers have observed in giant honeybee colonies. When shimmering, different groups of bees flip their bodies up and down in what looks like waves. This defense is initiated when hornets hover near a colony, serving to deter the hornets from approaching the bees. Researchers hypothesize that this behavior is a specialized defense response to hornets, as it is not observed when other, larger predators approach the colony. Which choice best states the main idea of the text?
a) Giant honeybees have a unique defense mechanism called shimmering.
b) Shimmering is a behavior that attracts hornets to honeybee colonies.
c) Giant honeybees use shimmering to communicate with each other.
d) Hornets are the main predators of giant honeybee colonies.
