Explain why Point A is younger than the rest of the sandstone layer. (Hint: look at the key)

Point A is younger

Explanation:

Point A is on an extrusion. A extrusion that also forms on layers on top of the layer the question asks for, is definitely younger. It reaches all of the way to the 1st layer, yhe Breccia layer.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".