Answer:
The answer is C)
Explanation:
The predators were unable to keep the population of the mussels down. The mussels took more area of the rock. Other species that needed space did not return to the tidal pool. Otters can also be keystone species as they eat urchins. By doing so, they prevent the sea urchins form eating all the kelp plants and removing the entire habitat for many other species. The Keystone Species theory shows that this impact of few predators, that made up a minor amount of the total species, could have such a high impact on the ecosystem.
B.evaporation because when heated water evaporates
<span>It was called that, but that is wrong. Actually, what is now called the Middle East was where the first Civilizations started. Sumer, Akkadia, and Babylon were the first three and they existed long before the area of Italy was civilized. It is even possible that Greece was civilized earlier than Rome. If you ask a Greek, they will say it is so anyway.
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D. Were nomads who hunted and gathered
The answer is a) manganese nodules
