Erosion
Bc of water rushing
Gravity is stronger, the closer the two objects are to each other - that's why you can "escape the Earth's gravity" if you go far enough from it.
So we have to look for the date with the shortest distance - it's 24th December 2010, when the distance was only 368000 km.
Answer:
Curitiba, city, capital of Paraná estado (state), southern Brazil. It lies about 3,050 feet (930 metres) above sea level near the Atlantic margin of the Brazilian Highlands and the headwaters of the Iguaçu River. ... Since 1940 Curitiba has sustained rapid economic and population growth.
