Which can occur in a physical change? The mass can increase. The particles can arrange in different ways. The mass can decrease. The atoms can bond to different atoms

Physical change is a change in state or phase which does not produce a new substance. Physical changes include changing the state of a pure substance between solid, liquid, and gas phases of matter, like melting, freezing, vaporization, condensation, sublimation. The following can occur in a physical change: The particles can arrange in different ways. Correct B All other options are characteristics of a chemical change which results in new substance.

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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.