Scientists have developed a way to use certain kind of waves to help "levitate" or float objects in the air. The waves are used to change the air pressure to perfectly help counteract the force of gravity. What types of waves are used?
A) electromagnetic
B) light
Eliminate
C) sound
D) water

probably electromagnetic

Explanation:

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c