Question

Exercise 4.B: Insert articles wherever necessary and rewrite these passages. 1. . Process of making cultured pearls was known to Chinese as early as 4000 years ago. They used species of mussel in rivers and lakes to make pearls.
2. To produce cultured pearls, young oysters are planted in very cautiously prepared oyster beds. When oysters are three years old, they are taken out of beds to special production plants.
3.It is quality of lustre and colour of nacre that decide value of pearl. Until the 1940s, pearl oysters were chiefly found in Persian Gulf near Island of Bahrain. Other natural pearl oyster beds were located in South Pacific Ocean.
4. If pearl has irregular shape, having grown over rough object, it is known as baroque pearl. In jewellery trade, pearls are generally known as pear, bell or drop according to shape.​

Answer 1

Explanation:

A cultured pearl is a pearl initiated by a mussel or oyster farmer under controlled conditions using two very different groups of bivalve mollusks - the freshwater river mussels and saltwater pearl oysters.