Processes that are caused by forces from within the Earth are endogenous processes. By contrast, exogenous processes come from forces on or above the Earth's surface. Endo is a prefix meaning "in" while Exo is a prefix meaning "out". There are three main endogenous processes: folding, faulting and volcanism.
One physical feature is a mountain.
Answer:
For WW1, what caused is the assassination of Archduke Franz Ferdinand in Sarajevo on 28th June 1914, which means Austria-Hungary had threatened war on Serbia.
For WW2- it was the political takeover in 1933 of Germany by Adolf Hitler and his Nazi Party and its aggressive foreign policy, and to a lesser extent, Italian Fascism in the 1920s, and Japanese militarism preceding an invasion of China in the 1930s. which is the reason why and how World War 2 occurred.
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