Final answer:
In nineteenth-century Britain, most members of the aristocracy derived their wealth from land ownership. However, industrialization and involvement in world trade shifted the sources of wealth to commerce, industry, and trade.
Step-by-step explanation:
In nineteenth-century Britain, most members of the aristocracy derived their wealth from land ownership. However, during this time, there was a significant shift in the generation of wealth away from land to commerce and industry. Industrialization provided new opportunities for wealth accumulation, and industries such as banking, commerce, and factories became major sources of wealth.
Additionally, Britain's involvement in world trade, including the slave trade and trade with South Asia, contributed to the accumulation of wealth for merchants and traders. The East India Company, for example, played a significant role in generating capital through its trade with South Asia.
Overall, the primary sources of wealth for the aristocracy in nineteenth-century Britain shifted from land ownership to commerce, industry, and trade.