Answer:
Among the options given on the question the answer is option C.
rising life expectancy
Explanation:In the early 20th century the United States was experiencing the decline of birth rate. There were many reasons behind this. Like as world war I, the Great depression effect in the economy. But after world war II, USA experienced a great increase in the birth rate during the period of 1946 to 1964. This period is called as the Baby Boom in the history of USA. By the end of 1964, 76.6 million babies were born during the period of baby boom.
There are many reasons behind this massive increase of birth rate. Life expectancy was one of the main reason behind this. The strengthened economical condition of the USA has increased the facilities of the people. As a result couples were more willing to have babies.
Moreover soldiers returned from the world war were given the opportunity of job and social securities.As a result they got married inthe pursue of better and fulfill life. 2.2 millions couple were married in 1946 and most of them were strongly inspired to have baby to accomplish the family.
So it can be said that rising life expectancy was a factor behind the Baby Boom.
Answer:
On the 30th of December which equates to 0.065 billion years ago
Explanation:
The cosmic calendar was made popular by a famous astronomer named Carl Sagan. His aim was to help people to better understand when a particular prehistoric event in the universe occurred when compared to another prehistoric event.
He achieved the aim by chronologically arranging the 13.8 billion years of the universe age into one year. According to such arrangement, the Big Bang occurred on the 1st of January (13.8 billion years ago) while Dinosaurs went into extinction on the 30th of December (0.065 billion years ago).
Following their extinction, the age of primates began on the 31st of December (Just 40 million years ago). You can see that Carl Sagan's visualization puts the beginning of primates (which men evolved from) immediately after the extinction of Dinosaurs and very far away from the Big Bang that signifies the creation of the universe.
I think the answer would be B, because our world could become overpopulated, which is very likely.
Hope I helped!
~Mschmindy
Answer:
Canals are also used to transport water for irrigation and other human uses. In California the water supply situation has been relatively unstable
Explanation:
Answer:
<h3>Our human ancestors, who looked like a cross between apes and modern humans, had access to food, water and shady shelter at a site in Olduvai Gorge, Tanzania. ... "It was a very stressful life because they were in continual competition with carnivores for their food."</h3>
