IMMIGRATION TO THE UNITED STATES BY DECADE. 1821-1910 10 7 INNE Number of Immigrants (millions) 5. 4 1 1901– 1821- 1830 ) 1831- 1840 1851- 1860 1850 Source: U. S. C'eu Buena ng the chart above, answer (a), (b), and (c). Briefly explain ONE specific historical event or development that accounts for the patterns depicted in the chart between 1861 and 1890. Briefly explain ONE specific historic effect that resulted from the patterns depicted in the chart between 1861 and 1890. Briefly explain a SECOND specific historic effect that resulted from the pattems depicted in the chart between 1861 and 1890.​