a student had heard that a goldfish will grow to the size of their tank she wanted to know if this was true or not, so she went to the store and bought fish and 3 different size tanks. in each of the tanks, she placed 3 fish (all 3 cm long), the required amount of water for that tank, 2 cm of gravel at the bottom, and installed the correct pump for that tank. each other month for a year she calculated the average length of the fish in each tank. her data is below

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