Carbon tends to form four bonds. what kind of bonds are they?

Carbon forms covalent bonds; the most usual kind of bond formed by carbon is a covalent bond. In the majority of situations, carbon shares electrons with other atoms because of the presence of four valence electrons.

As carbon has four valence electrons in its outermost shell, and as each covalent bond needs a donation of one electron to form the bond, carbon tends to make exactly the four bonds and is only stable if all four of these bonds are utilized.

what bodys are there orbiting?

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.