The table below shows the age of fossils found in four separate layers of an undisturbed rock:

Fossils In Rock Layers
Layer Fossil in Layer Age of Fossil (million years)
A W 550
B X 240
C Y 680
D Z 450

Which is the topmost layer of the rock?
Layer A
Layer B
Layer C
Layer D

The anwser should be Layer B because it's the lowest one out of A, C, D

Explanation:

Hope this helps!!

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

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