Apiculture : honeybees, horticulture : plants, pisciculture: fishes, sericulture: silk worms

Introduction:
The rearing of silk worms for the production of silk is known as sericulture. It is an ancient art and science of silk production that involves the cultivation of silk worms and the harvesting of their cocoons.

Explanation:
1. Sericulture:
- Sericulture is the correct answer to the given question.
- It is the process of raising silk worms to produce silk.
- The silk worms are reared in controlled environmental conditions and are fed with mulberry leaves.
- The silk worms spin cocoons made of silk thread, which are then harvested for the production of silk.

2. Apiculture:
- Apiculture refers to the rearing of bees for the production of honey and other bee products.
- Bees are kept in hives, and they collect nectar from flowers to make honey.
- Apiculture is not related to the production of silk, so it is not the correct answer.

3. Pisciculture:
- Pisciculture is the practice of rearing fish in controlled environments such as ponds, tanks, or cages.
- It involves the breeding, rearing, and harvesting of fish for commercial purposes.
- Pisciculture is not related to the production of silk, so it is not the correct answer.

4. Horticulture:
- Horticulture refers to the cultivation of plants, including fruits, vegetables, flowers, and ornamental plants.
- It involves the science and art of growing and maintaining plants for food, medicinal, or aesthetic purposes.
- Horticulture is not related to the production of silk, so it is not the correct answer.

Conclusion:
The correct answer to the question "What is the rearing of silk worms for the production of silk called?" is sericulture. Sericulture involves the cultivation of silk worms and the harvesting of their cocoons for the production of silk.