The correct answer is option 'B) Himachal Pradesh'.

Gaddi shepherds are a community of nomadic shepherds who reside in the state of Himachal Pradesh in India. They have a unique way of life and follow a cycle of seasonal movement, similar to many other nomadic communities.

Here is a detailed explanation of why Gaddi shepherds belong to Himachal Pradesh:

1. Introduction to Gaddi Shepherds:
- Gaddi shepherds are a community of nomadic herders who primarily rear sheep and goats for their livelihood.
- They are known for their exceptional skills in herding and their deep knowledge of the local terrain.

2. Geographical Location:
- Himachal Pradesh is a state located in the northern part of India.
- It is surrounded by Jammu and Kashmir to the north, Punjab to the west, Haryana and Uttarakhand to the south, and Tibet to the east.
- The state is known for its diverse landscape, including high mountain ranges, deep valleys, and lush green meadows.

3. Traditional Occupation:
- Gaddi shepherds have been traditionally engaged in animal husbandry and have a long history of migrating with their livestock.
- They move with their herds across different altitudes in Himachal Pradesh, depending on the season and the availability of grazing land.
- During the summer months, they take their livestock to higher elevations in search of fresh pastures.
- In winter, they descend to lower altitudes, where the climate is milder and there is enough fodder for their animals.

4. Cultural Significance:
- The Gaddi community has a rich cultural heritage, deeply rooted in their nomadic way of life.
- They have their unique dialect, customs, and traditions.
- They are known for their folk songs, dances, and vibrant festivals, which celebrate their close association with nature and their livestock.

5. Conservation Efforts:
- The Gaddi shepherds play a crucial role in the conservation of the fragile ecosystem of the region.
- Their seasonal migration pattern allows the land to regenerate and prevents overgrazing in a particular area.
- They have a deep understanding of the local flora and fauna, which they pass on from generation to generation.

In conclusion, Gaddi shepherds belong to Himachal Pradesh, as this is the region where they have been traditionally residing and practicing their nomadic way of life for generations. Their seasonal movement with their herds across different altitudes in the state is an integral part of their cultural identity and plays a vital role in the conservation of the local ecosystem.