the internal structures provide shapes and support to a variety of living organisms both unicellular and multicellular
Answer:
Challenger Deep
Explanation:
In the Pacific Ocean, somewhere between Guam and the Philippines, lies the Marianas Trench, also known as the Mariana Trench. At 35,814 feet below sea level, its bottom is called the Challenger Deep — the deepest point known on Earth.
Answer is z
Because I said so