Which of the following traits make a good index fossil? A small geographic range
B large body size
C short-lived as a species
D plants instead of animals

d

Explanation:

An index must have animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment

plato users

given bodies of water

pacific / arctic / indian / southern

[ a ] the caribbean sea

[ b ] the northern ocean

[ c ] the atlantic ocean

[ d ] the barents sea

with this being the given answers

b. lithosphere, asthenosphere, mesosphere   is the answer most likely