Which is the best description of a change in society that has resulted from advances in understanding the causes of diseases? a)an increased number of hospitals b)improved methods of sanitation c)improved use of microscopes d)increased wages for healthcare workers

The correct answer will be option-B.

Explanation:

Sanitation is an act or process which involves taking out or disposal of the urine and faeces away from the infrastructure in order to be hygienic.

The advancement in technology to understand the cause of various diseases has led to improve the conditions of society. The research has provided evidence which could improve society like it helps improve the method of sanitation. The sanitation improvement can lead to hygienic society.

Thus, Option-B is the correct answer.

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.