Which of these best describes earth’s crust? inner layer consisting of two parts middle layer, density increases with depth top portion called asthenosphere, thickest layer thinnest under the oceans and thickest under continents

D. Thinnest under the oceans and thickest under continents

Explanation - Earth is divided into three layers - crust, mantle and core. Crust is the outer most layer, mantle being the middle one and core is the innermost layer.

Beneath the oceans, crust is thin whereas beneath the continents, crust is the  thickest. The density of the Earth's crust is least or minimum as compared to the mantle and core. The composition of crust are as follows -  

oxygen +1 most likely

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )