Grace recently took a cruise onboard a luxury liner. a few days into her vacation, she developed signs of infection, the most common food-borne illness in the united states. a. anisakis b. trichinella c. botulism d. norovirus

The right option is d. norovirus infection

Noroviruses are viruses that cause gastroenteritis ; a condition that causes vomiting, fever and stomach pain. Norovirus is highly contagious. It spreads through contaminated food or water and through close contact with an infected person. Norovirus is the common cause of epidemics of gastroenteritis on cruise ships and it is the most common food-borne illness in the united states.

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