Why do bills pass the senate and then go back to the house?

Which of the following events most directly contributed to the establishment of israel as a nation

Quick using the information in the graph, one might speculate that a) w.w.i created increased job opportunities in the u.s. b) the election of president hoover in 1936 caused unemployment to decline. c) the return of soldiers following w.w.ii caused unemployment to increase in the u.s. d) the new deal programs of president roosevelt created employment opportunities in the u.s.

Stie cineva cati ani poti fii director de sa imi specificati si legea va rog