| A | B |
|---|
| Economy | wealth and resources of a country |
| obstacles | prevent or hinder progress |
| accomplishments | something achieved |
| motivation | the reason for behaving a certain way |
| empire | a number of countries under a supreme singe power |
| superiority | advantage, above |
| navigation | traveling on water |
| starvation | to die from hunger |
| adequate | satisfactory |
| territory | the area of land under one ruler |
| cooperation | working together |
| conflict | serious argument |
| enslaved | make someone a slave |
| technology | application of scientific knowledge for practical purposes |
| arousing | excite or provoke |
| impact | to influence |
| dispersed | distribute |
| sod | surface of the ground with grass |
