C. focus .......................................................
The answer is A. embarrassed.
<h2>
<em><u>air</u></em><em><u> </u></em><em><u>pollution</u></em><em><u> </u></em></h2>
Explanation:
<h3><u>I</u><u> </u><u>don't</u><u> </u><u>know</u><u> </u></h3>
Answer:
Correct answer is the Columbian Exchange
.
Explanation:
The Columbian Exchange is the correct answer as during this period many products were exchanged between Old and New World. It is the term that was coined after Christopher Columbus who discovered new continent, thus establishing links between these areas.
All other terms are not connected with this diffusion, therefore only second option is correct.