An isolated system is best characterized as a system in which: energy can freely enter and leave but matter cannot. matter and energy can freely enter and leave. matter can freely enter and leave, but energy cannot. energy and matter cannot enter or leave.

Correct D). Energy and matter cannot enter or leave.

An isolated system is a system in which neither the energy nor the matter can enter or leave the system. As a result of that,  the total mass of the system remains unchanged.

There is a change in the species present, But, the total mass present will not change based on the law of conservation of matter and energy.

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