which western power colonized most of the western part of North and South America? Brazil Australia spain

I think it would be Spain

Explanation:

the European canonization of the Americas describes the history of the settlement and establishment of control of the continents of the Americas by the most of the Naval power of Western Europe

Answer: Portugal

Explanation: This is because the eastern tip of Brazil penetrates the line agreed to in the Treaty of Tordesillas, so the region was colonized by Portugal. The treaty ignored any future claims of the British and French, the other European superpowers of the time.