In which of the following is most of the water on earth held? . a.. rivers. b.. glaciers. c.. soil. d.. the ocean

The answer would be : D. Ocean

The earth consist of more than 70 % of water.

And from that 70 % ,

97 % of them  is located on the Ocean

hope this helps

Answer// dinosaurs emerged during mesozoic era;

The answer is d. none  hope this .