Answer:
Which side of a line they could claim and control.
Explanation:
The Papal Line of Demarcation was a boundary that divided the territories of the Spanish and the Portuguese. This line was first defined in 1493 by Pope Alexander VI. However, it was then revised by the Treaty of Tordesillas of 1494. With this line, the empires were able to tell which side they could claim and control. Spain was able to gain control of the lands discovered west of the line, while Portugal controlled those to the East.
