Answer:
I don't understand it I am so sorry
Your answer would be D, Photosynthesis
Hope this helps!
Answer:
B is oldest because it is at the bottom which entails that it is the oldest.
Explanation:
Place mercury in the reactor. After a large amount of work, only a tiny portion of gold is created.
Decontaminate the resulting gold. This is harder than it sounds because you can't separate out non-radioactive gold from radioactive gold using purely chemical methods.
It should be obvious from this process that it currently costs much more money to create non-radioactive gold than you could ever earn by selling the gold. Creating gold from other elements is currently an expensive laboratory experiment and not a viable commercial activity. Perhaps technology will improve enough in the future to make creation of gold in nuclear reactors a profitable economic enterprise.
Answer:
Gulls, since they are the only predators shown for the green crabs.
