Answer:
producers
Explanation:
because if you think about it produces, make their own energy and they're the highest level of energy.
I believe the answer you're looking for is photosynthesis, where plants release oxygen and humans use this to release carbon dioxide to the plants.
I am not thinking of a creature but of a tree which is the gingko tree which was in existence back 200 million years ago and there is one on a street where we lived in Vancouver BC and they grow in various parts of the world still. The coelocanth is a prehistoric fish which still lives in the sea also. I think that evolutionists would view such living 'fossils' as proof that these organisms were so well adapted to a wide range of environments or were able to find environments that they originally thrived in that they could survive so long. Also, probably the longer they survived changed conditions the tougher they would get. A creationist would say aha that shows that species don't change and evolve which of course would deny the overwhelming evidence of the change in species through time such as amongst man's ancestors.
I think C because in order to tell what the age is it depends on the depth of it like fossils the deeper the older it gets Soo if I dug a tunnel 25 meters deep I could be able to tell the age and if u dug a little bit more u can maybe fine dinosaur bones that and the ground and sea ground can change or shift from place to place. I hope u found this a reasonable answer for u.