Answer:
An Era is usually defined as a major subdivision of geological Eon. It represents a period of long time, in terms of millions of years. There are 3 Eras of the Phanerozoic eon, according to the geological time scale, they are the Paleozoic, the Mesozoic and the Cenozoic. All these 3 Eras are comprised of many sequential arrangement of major and minor events soon after the formation of earth.
This sequential arrangement of events shows the progressive evolution from the unicellular organisms to the multi-cellular and more complex organisms. These eras are comprised of various fossils and fossil assemblages, which are explored in the recent times. The study of these fossils helped in the understanding and evolutionary pattern of how life evolved on earth.
Geography has a profound effect on where civilizations settle. The earliest civilizations resided within river valleys, and used the area around them to create opportunities to benefit their growth. Mountains, rivers, and plateaus provided natural defenses, at the cost of movement and trade.
The wife had to take on responsibilitys such as working in the farms and making money for the familys.
I believe the answer is the first one
