Kelp is a -- since it converts -- to organic energy by photosynthesis. Several physical properties of the ocean promote its growth: kelp requires -- and nutrients; and it lives in regions where waters are cool throughout the year. Kelp plays an important role in the ocean. It provides a -- for many species, such as sea otters that forage and raise babies in the kelp beds. It also acts as a -- for many organisms, such as the sea urchin. Kelp harvesting has many effects on both ecosystems and humans. Extensive harvesting -- populations of fish and other organisms that live in kelp forests. However, harvesting -- profits for companies that use kelp, such as those that produce -- , an additive used in food and cosmetics. Fill in the blanks.

what have fossils ever done for you

estuaries are the partially enclosed coastal bodies of brackish water formed at the mouth of sea where river meets an ocean. it is a transition zone between river and sea water so estuaries are influenced to both marine environment such as tides, waves and to riverine such as flow of fresh water and sediments. the mixing of sea and fresh water provide high level of nutrients, making estuaries a high product habitats.

many estuaries suffers degradation from a variety of human activities like erosion from deforestation, overgrazing, overfishing, drainage and eutrophication.

so from the above statement answers will be

1. false as estuaries are formed due to both brackish and freshwater.

2.true, due to high productivity estuaries are breeding ground for many marine species.

3. direct and indirect activities of man that contribute to pollution and deposition of sediments.

c.           is the correct answer