What are some differences in europeans and tainos

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries

What does portia compare a rumor to? how does she describe how the rumor is circulating? what is shakespeare's purpose in using this imagery?