The sponsor for Columbus and sponsoring Portuguese exploration was based on a common interest in trading and expanding their territory.
<u>Explanation:</u>
Prince Henry was also known as the navigator led his nation's exploration towards Africa and Atlantic nations. His mariners successfully established their foothold and built a trading empire in those nations. They also expanded their territory by colonizing the regions.
Columbus was sponsored by Ferdinand and Isabella for two major reasons. One is they wanted to establish trade routes to the Atlantic nations. To overcome Portugal in trading to win the rivalry between their countries. Another one is to expand their territory and Christianity.
