PLEASE HELP Is an omega-3 fatty acid a saturated or unsaturated fatty acid and why? A. Omega-3 fatty acids are unsaturated; they have a double bond at the 3rd carbon from the tail end of the molecule. B. Omega-3 fatty acids are saturated; they have a double bond at the 3rd carbon from the tail end of the molecule. C. Omega-3 fatty acids are unsaturated; they have a double bond at the 1st carbon from the front end of the molecule. D. Omega-3 fatty acids are saturated; they have no double bonds anywhere in the molecule.

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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