What three groups were involved in the boer war? why was the war fought ?

Great Britain, South African Republic, and Orange Free State

Explanation:

The Second Boer War was fought over the British invludence in South Africa resulting in the Treaty of Vereeniging and the collapse of the South African Republic and Orange Free State - Britian won.

the event that was most responsible for ending the great depression is world war 2.

the answer is a. 250 percent.