While genetic modification of food has numerous advantages, some people are concerned about the potential of genetically modified crops to a.) add vitamin and mineral supplements to food. b.) target harmless insects unintentionally. c.) clean up pollution in contaminated soil. d.) resist extreme temperature changes.

The best answer to the question: While genetic modification of food has numerous advantages, some people are concerned about the potential of genetically modified crops to:___, would be, B) Target harmless insects unintentionally.

Explanation:

Although it is undeniable that genetically modified crops have become an advantage because they are resistant to insects, and therefore may require the use of less pesticides, it has also become a threat for the survival of species that are not harmful either to crops, or to human health, and whose existence may be dependent on those who are. Thus, genetically modified food from crops may put an ecosystem´s balance at risk by targeting insects that cause damage to crops, but, are essential for the survival of other species.

this is math not biology xd

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.