Basically physical and chemical weathering (do not confuse with erosion, which involves movement) contribute to the destruction of mineral forms. In this case it breaks down the rocks, minerals and soils, creating slopes and hills. It may be caused by (any form of) water, wind, gravity, waves or sunlight.
The country which lies between Croatia and Serbia is Bosnia and Herzegovina. Bosnia and Herzegovina is in southeastern Europe and its capital is Sarajevo. It also has a border with Montenegro and has a coast next to the Adriatic Sea.
Extinct animals can be the evidence of pre-existing life , such as dinosaurs
The Human Development Index is a statistic composite index of life expectancy, education, and per capita income indicators, which are used to rank countries into four tiers of human development.