<span>Good Morning!
The specialization of work is as old as the first human groupings, and it was through division by sex. The invention of the wheel dates from at least 2000 years before Christ, and can be extended up to 3,500 years if we take into account the first illustrations of a wheel. The controlled use of fire, in turn, dates back more than a million years, while the development of agriculture is about 10,000 years old. Thus, among the discoveries and inventions pointed out. It is worth noting, however, that the invention of the wheel, while important, would not contribute to such a large population growth.
Agriculture (letter d), gradually improved from 5,000 BC, is the fundamental factor for population growth, which could now settle, rather than live as a nomad.
Hugs!
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A Stratum is a layer of rock in the ground
It should be D
