Final answer:
About 25,000 laborers migrated to California from China, Europe, South America, and Canada during the California Gold Rush.
Step-by-step explanation:
During the California Gold Rush, approximately 25,000 laborers migrated to California from different parts of the world.
China, Europe, South America, and Canada were among the main sources of immigrants during this period. However, the majority of the laborers came from China.
The lure of finding gold and the economic opportunities associated with the Gold Rush attracted people from diverse backgrounds to California.
Learn more about California Gold Rush