Answer:
e. a useful illusion used to map the stars and other objects in the sky
Explanation:
A celestial sphere is a graphical representation whose purpose is to describe the different locations of objects in the sky. A Celestial Sphere depiction contains Earth's rotation axis, North Celestial Pole, South Celestial Pole and Celestial Equator.
There are many that don't affect the weather. Is it multiple choice?
It connects the continents of North and South America, controls the Panama Canal, is an important trading route.
