Final answer:
By the late fifteenth century, European sugar production shifted to islands in the eastern Atlantic Ocean, particularly São Tomé and Príncipe. These islands had ideal conditions for sugar production.
Step-by-step explanation:
By the late fifteenth century, the focal point of European sugar production shifted to the Azores and other islands in the eastern Atlantic Ocean that were noted for their rich, volcanic soil. The Portuguese settled the islands of São Tomé and Príncipe in the Gulf of Guinea, which had a tropical climate and volcanic soil ideal for sugar production. These islands became Europe's single largest sugar supplier and a center of sugar production.