They are valuable for the appointive procedure. The two gatherings fill in as a quite decent method for getting similarly invested individuals together. In the event that they were not there, it would be substantially harder to distinguish great competitors, motivate them to keep running for office, bolster them.
They fill in as a contradicting element to the intrigue gatherings. In the event that it were not for parties, the intrigue gatherings would be unopposed. The gatherings attempt to pull individuals together in expansive coalitions. The intrigue bunches attempt to pull them separated on single issues.
The one that differentiates Christopher columbus from Bartolomeu Dias is : Columbus planned to reach Asia by sailing west across Atlantic Ocean, while Dias hope to reach Asia by sailing around Africa and through the Indian Ocean.
Hope this helps
The argument of missile defense in the nation of Cuba is a non-starter because the USA will never willingly allow a nation that is so close to its territory, and is an ally of its arch enemy, Russia, to have such a defensive system installed, because it will also mean that Russia may use Cuba as its military base and threaten the USA territory at any moment, from close proximity, and also they will have a protection by any attack as a response.
The answer that your looking for is c. "aquaculture." I hope this proves helpfull!
