Oogenesis occurs in the

Oogenesis occurs in the peripheral (outermost) layers of the ovaries present in the female reproductive system.

Explanation:

Oogenesis is the process of female gamete or ovum/egg formation from the primordial germ cells called oogonium originating from the embryo's yolk sac. This process leads to various differentiation and maturation processes to produce a mature ovum.

Oogenesis occurs in three stages – multiplication, growth and maturation stages.

The initial cells undergoing meiotic division are called the primary oocytes which later develop follicular layers and vitellogenesis to form the secondary oocytes before maturing into a fully potential mature ovum. Oogenesis results in haploid number of gametes.

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.