Describe the line of demarcation established by the treaty of tordesillas I WILL GIVE

The Treaty of Tordesillas was agreed upon by the Spanish and the Portuguese to clear up confusion on newly claimed land in the New World.

Explanation:

It was to establish a boundary

The Treaty of Tordesillas neatly divided the “New World” of the Americas between the two superpowers. ... All lands west of that line were claimed by Spain.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories