Answer:
The ancient Greeks and Romans used dated references to eclipses to improve the calendar. They also noted phenomena related to eclipses. The corona seen during eclipses was only identified as a solar phenomenon in the middle of the 19th century.
Explanation:
D political parties working together towards a common goal
Answer:
the improvement in knowledge about medicine
Explanation:
People moved West because the government offered new settlers a lot of land for farming at a very low cost