Answer:
Social harmony is the living together of people of a particular social group with love, care, respect and brotherhood, regardless of their religion, region, caste, gender, colour etc.
They were loosing their lands that's why we can choose a) weak leadership
17-1800's
I know that James Hutton is considered a father of modern geology and he was born during some where in the 1720's so that's the closest answer, also Charles Lydel was born during the late 1790's.
Ukraine, 1986, the worst nuclear accident in history happened in Chernobyl. A nuclear power plant exploded after the manager didn't do use proper safety precautions on a test. The fire from the explosion wouldn't stop, and the first responding firefighters died of acute radiation poisoning. The town was evacuated, as it is today. Today, some people consider the area around Chernobyl a natural reserve, as wildlife is growing it the radioactive area.
