Correct Answer: Eratosthenese

Solution : The correct answer is Erastothenese.

Erastothenese was a Greek astronomer, mathematician and philosopher. He was the first to used the word geography which meant Earth writing in Greek. He is also known as father of geography. He invented the system of latitudes and longitudes and was the first person to measure the size of Earth. He also calculated the diameter of earth. ​​​​