Anthropology and sociology
Answer:
Beaches would shrink until they were no longer there because the sediment is pulled away from the shores by the tide and there would be no new rock sediment to replace the old rock sediment.
The scientist you're looking for is an anthropologist.
Jan Ingenhousz discovered photosynthesis
I would say Satellites. Satellites are the only thing here I see can measure things globally, the rest is more regional.
