Question

how and why was the provisional government of kerenski thrown by bolshwiks

Answer 1

In October 1917, the Bolsheviks organized an armed rebellion against

the provisional government. Kerensky fled from the country and

Russia came under the control of the Bolsheviks. This event, through

which the Bolsheviks attained power, is known as the October

Revolution (as per Russian Calendar). Subsequently, a convention of

the Soviets was held and a cabinet was formed with Lenin as its head.