Which act introduced financial support for families with children in need in the 1930s?

The Social Security Act, enacted in 1935, marked a pivotal moment in American social welfare policy by introducing various forms of financial support for families, including those with children in need. This legislation established a safety net through programs such as Aid to Dependent Children (ADC), later known as Aid to Families with Dependent Children (AFDC). This program specifically aimed to provide financial relief to single-parent families, who were often facing economic hardship during the Great Depression.

The act emerged during a time when the U.S. recognized the necessity of supporting vulnerable populations, particularly children living in poverty without adequate parental support. By creating a structured approach to financial assistance, the Social Security Act laid the groundwork for future welfare programs, illustrating the government's role in addressing social issues and improving the living conditions of families and children.

The other options do not have the same historical significance concerning financial aid for families with children. The Orphan Welfare Act, Children’s Aid Act, and Child Protection Act are either not widely recognized or established later and do not specifically address the financial support systems introduced in the 1930s to aid families with children in need.