Which organisms were alive when newyork state was last covrd by a continental ice sheet?

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Which of the following statements about wearher along mountain ranges is correct

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples