Water has everything to do with politics, mainly because of large bodies of water being ports or pathways for ships to cross, it can lead to policies revolving around trade and taxes on imported goods.
If someone were campaigning someone could promise to reduce pollution in the area near the water, and promise to clean the water up and grab votes from the environmentalists or locals that (may) drink from the water or use it in some way.
The one that is most likely study written records would be : C. Historians
The history of mankind started the moment we developed writing technique. With writing, we could get more accurate interpretation about what's been happening in the past
The plate boundary is the result of movements in the latest either through the divergence, convergence or the formation transform or rift valleys. The occurrence of the earthquakes and volcanic eruptions around the zones of mountain belts and various other events led to the volcanic arcs.
A Mountain belt-like system of the Himalayas in Northern India is a result of the orogenic upliftment of sediments bright from the Tethys sea and splitting of the Indian subcontinent from the Australian plate to collide with the Eurasian plate.
A continental volcanic arc forms due to the lava a magma that originates in the form mantle plums produced due to the burning of the lighter plate over the oceanic plate and volcanoes like the Andes form when the slab pulls the plate to the deep trenches.
And the san Andreas fault in California is a transform fault with dextral movements on both sides as the landmass is drifting westwards.