The Tang and Song dynasties are seen as two dynasties that brought progress, peace, and development of China and the people in China. They are successive dynasties, with Tang being the predecessor of the Song dynasty.
The Tang Dynasty managed to:
- expand the territory of China in Central Asia, Manchuria, and Korea
- reunited the country and brought peace and prosperity
- improved the infrastructure
- implemented examinations for higher positions in order to have only high quality people in the most important positions
The Song Dynasty managed to:
- continue what the Tang Dynasty was doing
- improved the relations and trade with other countries, significantly expanding both
It would be letter A which is energy. The other three are used in weather forecasting due to the fact that the atmosphere is fluid and weather and climate is caused by uneven heat from the star in our solar system which is the Sun to the Earth in which heat transfer occurs
They have a short vertical range and wide geographic distribution
California, Hawaii, Oregon, Washington and Alaska all border the mountain region and are located in the Pacific.
