There are a number of layers in this cake. The bottom layer is made of biscuit. Then there is a thick layer of chocolate. On top of the chocolate layer is the final layer which is made of cream and cherries. a layer (noun) is...
A.
a line of material, such as in cake or rock, that is on top of or beneath another line of material.
B.
a cake with many ingredients.
C.
when something, such as cake or rock, is made of one material.
D.
when something is made of circles of material, such as cake or rock, which are next to each other.