What does the joke about the Welsh being stranded on an island mean?

The original text should be like this: Two people were chatting, and one person asked: "If you were shipwrecked and stranded on an island, and you were only allowed to bring one thing, what would you want it to be?"

The person being asked was a Welshman, and he said: "A sheep."

"Hey, that's a great idea. Roast mutton, mutton soup, and mutton ribs can last for a long time. Wool can keep you warm. Sheep bones can be used to make tools, and sheepskin can also be used to make hammocks.”

The conquerors promoted Englishization in Wales, and the Welsh fought to maintain their language and culture. In the 16th century, during the reign of Queen Elizabeth, He won the right to translate the Bible into Welsh and played an important role in preserving and developing the Welsh language. But with the development of capitalism, the same economic markets were formed in Wales and England.

Welsh:

One of the British ethnic minorities in Western Europe. There are 700,000 people (1978), accounting for 1.3% of the British population, living in the Welsh Peninsula of Britain. They are descendants of ancient Celts and believe in Protestant Christianity. The Welsh were formed from the Gimri and Britons who had lived there since the beginning of the Christian era, both of which were Celtic tribal groups from mainland Europe.

During Roman rule, Christianity was accepted. After the arrival of Germanic tribes such as the Angles and Saxons in the 5th and 6th centuries AD, they were pushed to the line from the Wei River to the bottom of the river. They gradually united with the Anglo-Saxons in the struggle and established a unified country from the middle of the 10th century to the 11th century. . It was conquered by the Anglo-Saxons from the 13th century.