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.
Subsistence agriculture is a form of farming where a family or community harvests groups for their personal consumption while market-oriented agriculture relies on the harvest of cash crops
False, sources of salt water are ocean, sea water, <span>Some of the ocean's salts have been dissolved from rocks and sediments below the sea floor</span>Others have escaped from the Earth's crust through volcanic vents as solid and gaseous materials.
