full-stem curl half-stem curl no-stem curl rectangular base pin curls triangular base pin curls arc base pin curls square base pin curls Recommended along the front or facial hairline to prevent breaks or splits in the finished hairstyle. Placed half off the base of the curl. Usually recommended at the side front hairline for a smooth, upswept effect. Suitable for curly hairstyles without much volume or lift, and can be used on any part of the head. Placed directly on the base of the curl. Placed completely off the base of the curl. Give good direction and may be used at the hairline or in the nape.

uhh-.. wait elaborate more please

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.