<span>Found mainly in the Gulf of Mexico, it would be "A. oil" that is Mexico's most important natural resource, since this usually brings the largest amount of revenue. </span>
I believe the answer is 4. During the reign of Askia Muhammad, the Songhai empire reached its greatest size.
Askia Muhammad was an emperor, military commander, and political reformer of the Songhai Empire in the 15th century. His rule resulted in trade with Europe and Asia, building of lots of schools, and spread of Islam through his empire.
Hope this helps! Please let me know if I'm wrong :)
Rotation.
Crop rotation is when a farmer changes the crops grown in the same field each year to ensure he gets the best harvest possible by not exhausting the soil of specific nutrients by repeatedly growing the same thing.
Francesco Petrarch was the influential writer of the Renaissance who wrote Sonnets to Laura. The correct option among all the options given in the question is option "c". Petrarch was born in Italy on 20th of July 1304 and died on 19th of July in the year 1934. Petrarch was not only an Italian scholar but also a poet in Renaissance Italy.
Made it easier to cross the Appalachian mountains<span />
