6. the amount of a crop that a farmer can harvest per acre is referred to as crop yield. farmers have been able to increase their crop yield by adopting the use of genetically modified (gm) crops.
what’s the general trend shown

The general trend shown is that the amount of crop that a farmer can harvest per year keeps increasing by adopting the genetically modified crops in the U.S. and it keeps growing steadily. If it keeps up the future of GM crops use will depend on the ability of the farmers to adopt best management practices and the acceptance of the consumer for products from GM sources.

I hope it helps, Regards.

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.