Why is there only one star on California flag?

The single star on the California flag represents California's status as an independent republic during the Bear Flag Revolt of 1846. The revolt was a rebellion by American settlers against Mexican rule, and the flag was designed to symbolize their desire for independence. The star is a nod to the California Lone Star Flag, reflecting the influence of the Texas Lone Star Flag, which also represents independence. The bear and the star together symbolize strength and independence in California's history.