The “exchange” introduced a wide range of new calorically rich staple crops to the Old World namely potatoes, sweet potatoes, maize, and cassava. The primary benefit of the New World staples was that they could be grown in Old World climates that were unsuitable for the cultivation of Old World staples.
Is estimated to have killed 30 to 60% of Europe's total population.<span>In total, the plague reduced the world population</span><span> from an estimated 450 million down to 350 to 375 million in the 14th century.</span>
Answer:
Evidence supporting the Big Bang theory includes the presence of cosmic microwave background radiation, visual observation of redshifted objects and the abundance of primordial elements found throughout the universe. The Big Bang theory is the prevailing cosmological model for the universe.
Support for the Big Bang theory infers that all galaxies are moving away from the Milky Way, suggesting that the universe originated from a single point.
Explanation:
The correct answer is D.
Bay of Pigs disaster took place in 1961, when the CIA planned and sponsored an invasion of Cuba, after the great power that Fidel Castro had showed and his support of communism. The US underestimated the Cuban forces and the US troops were sent to a terrible defeat with a high number of casualities.
The unsucessful invasion was embarrasing for the Kennedy administration, but he had no regrets to assume the whole political responsibility for everything that happened in Cuba. US people liked his honesty and his population grew even further.
The correct answers are A) ban child labor and B) create safety regulations for factories.
Progressives pushed to protect workers by banning child labor and creating safety regulations for factories.
In that of the history of American labor, working conditions in the factories were terrible. Workers needed jobs and they accepted low paid jobs under poor working conditions. The spaces in the factories were unhealthy, overcrowded, and with no ventilation. So Progressives tried to protect workers improving the working conditions and banning child labor
