Final answer:
Mining material from asteroids can provide valuable resources for spacecraft construction and prevent asteroids from impacting Earth.
Step-by-step explanation:
One reason why anyone would be interested in mining material from an asteroid is to use asteroid materials for spacecraft construction. Asteroids have a variety of compositions and a low gravity, making it easier to extract valuable resources such as metals, water, and minerals from them. These resources can be used to build and fuel spacecraft for future space exploration missions. Additionally, mining asteroids can also help prevent asteroids from impacting Earth by deflecting them away from their collision course through the use of spacecraft.