Question

1. exploration of the deepest zones of the ocean is complicated by: near - freezing water temperatures extremely high water pressure complete darkness all the above 29. the ocean floor is sandy and flat. true false 30. the part of the ocean floor that slopes gently downward is called: the deep zone the continental shelf the ocean basin

Explanation:

For question 28, the deepest ocean zones have near - freezing water temperatures, extremely high water pressure, and complete darkness, which all complicate exploration. For question 29, the ocean floor has various features like mountains, trenches, etc., not just sandy and flat areas, so it's false. For question 30, the continental shelf is the part of the ocean floor that slopes gently downward.

Answer:

1. D. ALL THE ABOVE
2. false
3. the continental shelf