Shudy the table below showing the prevalence of influenza amongst oamers in a high school in Limpopo Province. There were a total of
325 boys and 392 girls in the school during the period of the survey
Month
Boys intacted with
influenza
Girls infected with
Influenza
17
59
32
April
May
June
JON
August
75
189
(2)
21.1 GiveTWO reasons why girls appear to have a higher rate of
infection than boys​

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.

it is a. i hope this .