Answer:
I believe the answer is C. Doldrums.
Explanation:
Hope my answer has helped you and if not i'm sorry.
Answer:
C. Amoebae and paramecia is the answer.
Explanation:
I would say that the fishes exhibited the greatest diversity (though the brachiopods also had considerable diversity) and mostly were of the ostracoderms (with a platey or shell-like skin and no jawbone) which exhibited many varieties and also the placoderm which had gills, a jawbone and fins so was developing characteristics of modern fish.
