Which could be its function???

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

Examine the following diagram. place the labeled layers in order from youngest to oldest.

The largest unit within which gene flow can readily occur is a