Which statement describes an effect of the columbian exchange?

a.
huge numbers of indigenous americans died from european diseases.

b.
european crops wiped out and replaced crops native to the americas.

c.
empires in the americas became wealthier and more powerful than ever before.

d.
horses became essential for trade and warfare in asia and europe.

The Columbian Exchange also had positive and negative effects. The positive side was the exchange of technology in agriculture, for example, which increased crop yields and food production in favor of Native Americans and in favor of Europeans. One of the negative effects was certainly the appearance of many diseases that Europeans transferred to the American continent. Native Americans first faced such illnesses, were non-resistant to them, and many of them died.

The correct answer according to the options offered is: A.

answer: the correct answer is d. a christian revivalist movement in the u.s. during the early 19th century

explanation: the second great awakening was lead by the preachers of baptist and methodist congregations in order to gain support for the protestant religion from the 1790's to 1840's

they both built pyramids.