Answer:
Saudi Arabia, Russia, the United States, and Iran
Explanation:
Tectonic plates often shift position by the force of liquid rock emerging from blow the earth's surface and then cooling to form hard rock. This most often occurs On the ocean floor.
When tectonic plates move, They move along the ocean floor, which is the crust, and It cause earthquakes and volcanoes and also caused Pangaea to break apart and become what it is now, The seven continents.
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It uses nephridium as the expiratory organ for flat worms
The mesenteries are double sheets of peritoneal membrane that suspend the visceral organs and carry nerves
Thanks to the mesentery the intestines are attached to the posterior abdominal wall. Mesentery is formed by the double fold of peritoneum (double layers of peritoneum) and its roles are to help in storing fat and to allow blood vessels, lymphatics, and nerves to supply the intestines.
