Answer:
Africa is the area which has the lowest amount of naturally available freshwater per capita.
Explanation:
Some parts of Africa have about 3879 m^3 of naturally available freshwater per capita. That is 12% of what is naturally available in South America, for instance.
The country that is an isthmus and links central and Souh America is Panama
Answer:
The Suez Canal allows easier contact between the Mediterranean and South Asian cultures.
The age of the Earth is around 4.6 billion years old