You have answered Question #4 correctly. The statement is false.
Portugal based its claim to Brazil on the fact that Pedro Alvarez Cabral had landed and had been the first European to discover Brazil in 1500.
Pedro Alvarez Cabral was a Portuguese nobleman, navigator, and also a military commander.
The answer is Irrigation
Before irrigation's technology developed, humans could only rely on Rain to maintain their Agricultural Water supply.
But as human intellectual developed , we finally able to adapt and created a modern watering system that helped to fulfill our Farm's water supply to survive in a dry Climate
