Answer: Four geological ages.
Explanation:
he development of the country is divided into four geological ages, prehistoric or Precambrian, ancient or Palaeozoic, Middle Ages Mesozoic, and New Age Cenozoic.
- The Precambrian period begins after the formation of the Earth's crust and lasts about 4 billion years, and it is the oldest and most extended period of Earth's history.
- The beginning of the old age was marked by intense volcanic activity and the Ice Age.
- The Middle Ages were the period of the dinosaurs who were the dominant beings of that period.
- The new age, or the age of mammals, begins with the change of the warm and cold periods and continues to this day.
Answer:
1. One important result of industrialization and immigration was the growth of cities, a process known as urbanization.
2. Urbanization refers to the population shift from rural to urban areas, the decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change.
3. Even though the Industrial Revolution produced harsh conditions for workers, child labor, and an increase in the cost of living it proved to have raised living standards in the 18th and 19th century due to increase in wages, technological advancements, and an increase in life expectancy and it allowed economies to thrive.
4. They offered operating flexibility in the short term, to route around fires and other temporary street obstructions, and in the long term, to be shifted easily into new areas needing service.
