Which of the following does NOT make studying the ocean floor difficult?
AThe ocean consists of salt water rather than fresh.
BThe deep ocean is in total darkness.
CThe water in the deep ocean is extremely cold.
DThere is tremendous pressure in the deep ocean.
AThe ocean consists of salt water rather than fresh.
BThe deep ocean is in total darkness.
CThe water in the deep ocean is extremely cold.
DThere is tremendous pressure in the deep ocean.