Yolanda is studying two waves. The first wave has an amplitude of 2 m, and the second has an amplitude of 3 m.

Advances in learning and technology made long ocean voyages possible

It could be anything, recent improvements in technology/telecommunication/internet have increased the pace of globalization.generally, it has something to do with technology. globalization means that people around the world are brought together through technology which speeds things up. so maybe some of those options could be correct. : )