Final answer:
The Chinese Exclusion Act of 1882 is a legislative action connected to unemployment and declining wages on the West Coast, as it banned the migration of Chinese laborers to reduce labor market competition there.
Step-by-step explanation:
The legislative action related to the issue of unemployment and declining wages on the West Coast that you are asking about is the Chinese Exclusion Act of 1882. This act banned the migration of Chinese laborers into the United States, which was a measure specifically aimed at reducing competition in the labor market, principally on the West Coast where it was believed that Chinese migrants were exerting pressure on wages and employment. Alternatively, the Homestead Act of 1862 was a federal initiative that encouraged Western expansion by offering sections of federal lands to settlers, so long as they improved the land by farming and building homes.