i will medal and fan if u help me plz

https://media.studyisland.com/pics/68115EarthsInteriorLayers.png
Imagine the Earth could be cut in half, like slicing a piece of fruit. Inside, you would see different layers.

There are two different ways to look at Earth's layers. One is based on what they are made of (composition). The other is based on how they behave (physical properties). Both kinds of layers are shown in the "sliced" Earth below.

(Image not drawn to scale.)
Look at the model of the Earth above. Based on composition, which layer is at Earth's surface (the thin, outermost layer)?
A.
the mantle
B.
the core
C.
the mesosphere
D.
the crust

Question

i will medal and fan if u help me plz

https://media.studyisland.com/pics/68115EarthsInteriorLayers.png
Imagine the Earth could be cut in half, like slicing a piece of fruit. Inside, you would see different layers.

There are two different ways to look at Earth's layers. One is based on what they are made of (composition). The other is based on how they behave (physical properties). Both kinds of layers are shown in the "sliced" Earth below.

(Image not drawn to scale.)
Look at the model of the Earth above. Based on composition, which layer is at Earth's surface (the thin, outermost layer)?
  A. 
the mantle
  B. 
the core
  C. 
the mesosphere
  D. 
the crust