A is a lump of abnormal cells that, although growing out of control, remains at its original site. 2. A is an abnormally growing mass of cells that is actively spreading through the body. 3. is the spread of cancer cells from their site of origin to other sites in the body. 4. An individual with a malignant tumor is

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