The formation of new organisms is called
a- reproduction
b- growth
c- adaptation
d- development

Answer;

A- reproduction

Explanation;

-Reproduction is a biological process through which new individual organisms are produced from their parents. It is a fundamental feature of all living organisms; each individual organism exists as the result of reproduction.

-There are two types of sexual reproduction, namely; sexual and asexual reproduction. Unlike sexual reproduction, which requires genetic material from two parent organisms in order to create an offspring, asexual reproduction occurs when a single organism reproduces without the genetic input of another.

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.