(D) They are rare as they are found deep in the ocean they are very dangerous when they do go off though like the san andreas fault which was where one transform plate boundary earthquake went off killed over 600 people, that gets rid of B and A, and they were even erupting over 10 million years ago which gets rid of C and gives you the answer D.
The physical systems of the earth include the lithosphere, the hydrosphere, the atmosphere and the biosphere.
The hydrosphere consists of the earth's water. Approximately 70% of the earth's surface is water. It is found in oceans, lakes, rivers ponds, ice and ground water.
The Lithosphere consists of the solid surface that covers the Earth. Features such as hills, mountains, plateaus, plains and ocean basins are land forms covering the lithosphere.
The atmosphere consists of the thin layer of gases that surround the earth and rises up to 100 miles from the earth's surface, beyond which is outer space.
The biosphere consists of all things living on the surface of the earth and includes animals and plants.
Gregor Mendel took it upon himself to force cross-pollinate his plants. He physically took pollen from one plant and brought it to the pollen of a different plant.
Iceland or Ísland as it is called in the native language is in Northern Europe, and a part of the Scandinavian union with Denmark, Norway, Faroe Islands, Finland and Sweden. The island is situated in between the countries of Greenland, the Faroe Islands and Norway, South of the Arctic Circle.
