Almost all humans to a certain extent are dissatisfied with the limited availability of resources, but if you're speaking from an academic point of view, it would be Economists, since they study choices made from this limited availability.
The man being described here is Prince Henry the Navigator. Prince Henry was a Portuguese man who helped spark the age of exploration. He is known for his several contributions to this era, including:
1) Opening of a school for navigation in Sagres, Portugal.
2) Mapping the west coast of Africa.
3) Laid the foundation for individuals like Christopher Columbus, Vasco Da Gama, and John Cabot.
Which of the following decreased steadily during the Second Industrial Revolution. Factory wages decreased steadily during this period.
I think it is
c) Many cities have developed along it.