What is the process called by which two species evolve in response to each other?

Coevolution

Coevolution is a fascinating process where two or more species evolve in mutual response to their interactions, as in the case of plants and their pollinators. This phenomenon shows how close ecological relationships lead to specific evolutionary adaptations, creating a dynamic of synchronized evolution. For example, the coevolution between bees and flowers has resulted in complex floral characteristics designed to maximize pollination, while bees have developed efficient nectar-gathering strategies. These mutual adaptations underscore the complexity of interactions in nature and the role of natural selection in shaping biodiversity.