The law of conservation of matter states that matter can be neither created nor destroyed. It can, however, be recycled. Earth's crust is recycled by the interactions of tectonic plates and convection in the mantle. Describe the role of plate tectonics in the conservation of matter on Earth. Please I need answers ASAP

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.