Theodore Judah was the person who convinced the railroad officials that it was possible to build a railroad line across line across the Sierra Nevada Mountains.He is also considered as the "Father of first Transcontinental Railroads.Judah had many opportunities that the people prior to him did not have.
Answer:
Hunter-gatherers were prehistoric nomadic groups that harnessed the use of fire, developed intricate knowledge of plant life and refined technology for hunting and domestic purposes as they spread from Africa to Asia, Europe and beyond.
Explanation:
The ozone layer is what protects us from the suns radiation.
Your question doesn’t sound right but that’s what I think you asked for.
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