European explorers introduced into the New World.

there are three main reasons for European exploration . them being for the sake of their economy , religion and glory . They wanted to improve their economy for instance by acquiring more spices , gold and better and faster trading routes . also they really believed in the need to spread their religion, Christianity .

Explanation:

The European brought technologies ideas , plants and animals that were new to America and would transform people's lives : guns , iron tools and weapons ; Christianity and roman law ; sugarcane and wheat : horses and cattle , they also carried diseases against which the Indian people's had no defenses .

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to protect the united states' role as a world leader, president truman wanted to prevent the soviet union from spreading communism beyond its post-world war ii boundaries. he declared that the united states must assist any nations struggling to prevent a communist takeover.