Why was Apollo god of megara?

Apollo was considered the god of Megara due to the city's association with his worship and the presence of significant temples dedicated to him. Megara, located near Athens, held an important place in ancient Greek culture, and Apollo epitomized various aspects of civilization, including music, prophecy, and the arts. The city's residents revered him as a protector and patron, integrating his cult into their civic identity and rituals. Additionally, local legends and myths often linked Apollo to the region, further solidifying his divine status in Megara.