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 -  

1. Solid rock has silicon and oxygen .

2. Oceanic crust has basalt .

3. Continental crust has granite .

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.