the ordovician period occurred between 488 million to 443 million years ago. the image shows a
sedimentary rock from late in the ordovician period with several different fossils of marine organisms.

arrows point to some fossils.

a. what can be inferred from these fossils?
marine organisms lived on the ocean floor during the ordovician period.

b. it was not possible for organisms to live on land during the ordovician period.

c. there was a diversity of marine organisms on earth during the ordovician period.

d. these fossils represent nearly all of the species alive during the ordovician period.