The Cambrian Explosion resulted in the evolution of the first representatives of most animal phyla. The second option among all the options given in the question is the correct option. The Cambrian Explosion is also known as Cambrian Radiation and it took place around 542 million years ago.
Answer: C) To provide for a defense pact against possible Soviet attack
Explanation: When, after the Second World War, the Soviet Union began with its influence in the Eastern European countries, and the introduction of communist regimes in those countries, Western Allies saw the danger of a possible spread of Communism. So in 1949, NATO was formed, North Atlantic Treaty Organization, to ensure collective security and to respond to the influence of the Soviet Union. NATO consisted of United States, Canada and several Western European countries. Today, the number of member states is much higher.
Kamikaze pilots were Japanese pilots that deliberately (and suicidally) crash landed into enemy ships during WWII
Answer:
The main reason for the growth of cities and suburbs in late 1800s and early 1900s was transportation innovations such as trolleys,streetcars and elevated roads.
Explanation:Mass transit system evolved.This helped large number of people to commute to work from distant places.Earlier transportation was not developed so it was hard for people residing in villages to commute to cities in search of their work .They had to work in villages in to earn a livelihood.Economic condition of farmers was poor .But transportation system was not developed enough to enable villagers to move to cities but with good and easy transportation they move to cities and settled their.This led to the growth of cities.
Industries began to grow rapidly in cities.Wealthier families move outside the cities and created the suburbs.Industrialization created many jobs and urged many more people to move to cities.New large cities such as Denver ,Chicago,Cleveland developed inland along new transportation routes.
