Which of the following was not an effect of the march 2011 earthquake and tsunami in japan?

In a economy individuals answer the three basic and the central authority or leaders have little say in the economy.

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?