Which individual is at the least risk for osteoporosis? thin, elderly male male weight lifter in his 20s petite asian female thin caucasian female in her 40s?

Answer : Option B) A male weight lifter in his 20's.

Explanation : Osteoporosis is a disease caused due to thinning and weakening of the bones that may strike many women after menopause, as well as some older men. So, looking at the giving options it seems that the male who does weight lifting during his 20's will be at least risk of getting osteoporosis as compared to the other examples given.

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.

answer/// wohler;