plz hurry why wasn't the western hemisphere (the Americas) part of the trade routes sooner than the 1490s

Ateam of scientists studied the sediment at the bottom of an ancient lake. they were able to determine the weather conditions of the indus valley in ancient times. they found that the entire area had suffered a drought after the monsoons declined. this drought lasted 200 years. because of the drought, there wasn’t enough food or water. the people of the indus valley were forced to leave their cities.

It may be reasonably inferred from the passage that sylvia’s attitude toward mistress molly’s antics is ?

-what is one question you might ask after reading the fred munguia's story?