Layer D is the oldest because bottom layers form first and are covered by new rock layers.
Probably (stimuli) hope this helps at all buddy
<span>The steps of speciation are identified as reproductive isolation and
genetic change. These can happen simultaneously or one after the other. This means
that the main aim is to have new species through evolutionary changes brought
by geographic barriers separating a population or due to behavioral change in a
sub-population and even being reproductively isolated. </span>
Answer:
Do you have any more information other than the photo? Such as notes?
