C. Convergent
Explanation:
When two plate boundaries collide, it causes earthquakes. The deepest and most powerful earthquakes occur at plate collision (or subduction) zones at convergent plate boundaries.
Answer:
Mercantilism and navigation technology.
Explanation:
European exploration and colonization of America began after Columbus's trip there in 1492. The first colonies to conquer part of the continent were the Spanish and the Portuguese, who quickly conquered most of South and Central America. Navigating nations like the English, French, and Dutch followed suit and conquered islands in the Caribbean called the West Indies, and later parts of North America.
The main motivation of these nations was to find new territories where to establish colonies producing raw materials, with the objective of supplying their markets and producing manufactured goods, which in turn were sold to the colonies. In turn, advances in shipping technology, especially the development of more advanced sailing ships, allowed Europeans to cross the Atlantic Ocean in an effort to meet their objectives.
The atmospheric concentrations of CO2 during Earth's past have always been changing, sometimes slowly, sometimes abruptly. The changes continue to the present day, and will continue in the future. The reasons for the oscillations in the CO2 levels are numerous, but while in the past they have been exclusively from natural causes, in modern times it is also the humans that got involved in it. The Cretaceous period had 1000 ppm of CO2, while the Eocene had 560 ppm of CO2. In the present, the CO2 concentrations are 405 ppm, thus significantly lower than the Cretaceous and Eocene. What can be learned from these two periods though is that such high concentrations of CO2 result in much warmer global climates, with ice sheets lacking, and the temperatures being much more equalized across the latitudes. If the current trend continues, there is every chance that our planet will experience such changes in the near future.
