Question 1: which. Question 2: that.
Answer:
It reinforces that the person is slipping towards death.
Explanation:
The words saved, shrunk, shank, and whistles in his sound all describe a man who is losing touch with his previous self i.e his living self. Therefore he is slipping towards death. Hope this helps :)
It could possible be ironic because the rest of the world was technically already "discovered", but just not by the Europeans specifically. Therefore it is ironic, simply because they are Naive
They all contributed to computer usage by developing operating systems and software that made personal computers possible.
Bill Gates made microsoft, Paul Allen founded microsoft, and Steve Wozniak and Jobs both cofounded Apple.