Concept:Nuptial flight is the mass departure of winged termite reproductives (alates) from their colony to find mates from other colonies.Explanation:During nuptial flight, alates from many colonies fly out together, which increases the chance that reproductives from different colonies meet and mate.This promotes cross-breeding/outbreeding, preventing inbreeding and maintaining genetic variation.Answer:C. ensure cross-breeding between members of one colony and another