Mr Gumede is a dairy farmer who started his farm with 3 dams and 2 sires. Currently, his having more than 30 lactating cows. However, there is high mortality rate in his herd. Mr Gumede is struggling to find the cause of mortality, because he never bought or exchanged bulls with other farmers for breeding. a) What may be the cause of mortality and explain your answer (8) b) As an animal breeding student, what advice can you give to Mr Gumede? (2)​

a time line cause it goes from 685 to 978

and after water is usually warmed by the sun the water temperature raises and then evaporates .

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.