Answer:
It's C. Factor 1 is a natural factor and Factor 2 may be influenced by both nature and human factors.
Explanation:
Mountain formation refers to the geological processes that underlie the formation of mountains. These processes are associated with large-scale movements of the Earth's crust. Folding, faulting, volcanic activity, igneous intrusion and metamorphism can all be parts of the orogenic process of mountain building. This indicator describes how the levels of major greenhouse gases in the atmosphere have changed over time. Concentrations of carbon dioxide in the atmosphere from hundreds of thousands of years ago through 2015, measured in parts per million (ppm).