<em><u>i</u></em><em><u> </u></em><em><u>guess</u></em><em><u> </u></em><em><u>its</u></em><em><u> </u></em><em><u> </u></em><em><u>Japan's economy</u></em><em><u> </u></em><em><u>slowed</u></em><em><u> substantially in the 1990's</u></em>
A since they must have evolved for a common ancestor or they would have different bone structure
Ocean floor subducts under continents because the ocean floor is softer and the crust in here is with lesser density and thickness, while the continents are harder because their crust is thicker and has bigger density. So when they collide, the softer ocean floor is pushed downwards by the harder continental crust.
