Which statement is correct about the inner core and mantle of the Earth? 1.The mantle is both solid and liquid, while the inner core in entirely solid.
2.The mantle is entirely solid, while the inner core in entirely liquid.
3.The mantle is both solid and liquid, while the inner core in entirely liquid.
4.The mantle is entirely liquid, while the inner core in entirely solid.

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.

the answer you are looking for is the united states forest service.

hope this !