What would the mean values be? (the green boxes)​

First Mean = 5

Second Mean = 3

Third Mean = 6

Fourth Mean = 9

Explanation:

For each column you just add up the data numbers and divide them by how many numbers is in that column which would be 3.

0.5 + 14.0 + 0.5 = 15 | 15 / 3 = 5

2.5 + 4.0 + 2.5 = 9    | 9 / 3 = 3

6.0 + 7.0 + 5.0 = 18   | 18 / 3 = 6

8.0 + 10.0 + 9.0 = 27 | 27 / 3 = 9

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