Question

why are there so many astronomical observatories in southern arizona? (1 point) many bilingual people live there. the state’s open and high spaces are great for observation. its warm and dry weather is ideal. the border states are cooperative.

Explanation:

Astronomical observatories need clear skies and low light pollution. Southern Arizona has warm, dry weather (low humidity, few clouds) which is ideal for observing celestial objects. Bilingual population, open spaces, or border state cooperation don't directly relate to astronomical observation needs. So the correct reason is its warm and dry weather being ideal.

Answer:

Its warm and dry weather is ideal.