The correct answer is b) Alappuzha.
Silica sand is a type of sand that is composed primarily of silica, which is a chemical compound with the formula SiO2. Silica sand is an important ingredient in glassmaking, as it is used to create the glassy matrix that holds the other ingredients together. Silica sand is also used in a variety of other industries, including construction, ceramics, and abrasives.
The main sources of silica sand in India are the states of Andhra Pradesh, Gujarat, Karnataka, and Tamil Nadu. However, silica sand is also found in other states, including Kerala. In Kerala, silica sand is found in the districts of Alappuzha, Ernakulam, and Thrissur.
The silica sand deposits in Alappuzha are located in the coastal areas of the district. The sand is extracted from the seabed using a variety of methods, including dredging and hydraulic mining. The extracted sand is then transported to processing plants, where it is cleaned and sorted. The clean sand is then sold to glassmaking companies and other industries.
The silica sand deposits in Alappuzha are a valuable resource for the state of Kerala. The sand is used to create a variety of products, including glass, ceramics, and abrasives. The sand is also exported to other countries. The silica sand industry in Alappuzha provides employment for a large number of people.