The Warring States Period (475–221 BC) was a period of division and conflict in ancient China. After the fairly peaceful and philosophical Spring and Autumn Period, various states were in conflict before the Qin state conquered them and reunified China under the Qin Dynasty.
Nutrient - a nutrient is a substance used by an organism to survive, grow, and reproduce.
Imperialism is the domination of a country by a group of people or another country. The old imperialism lasted from the 16th to the early of the 19th century, while the New imperialism started in 1870 and lasted for almost the entire 20th century. The most important feature that shaped the new era and not the old era was the introduction of the Industrial Revolution. The radical change in science, technology, and industry drove economic growth and boosted the European economy needs to new expansions.