Answer:
The implied main idea of the selection is
the benefits of the Social Security Act.
Step-by-step explanation:
a) President Roosevelt, in 1935, signed into law the Social Security Act. It is a federal law that provides for the general welfare of citizens through the provision of old-age benefits. It also provides social insurance for blind persons, dependent and disabled children, maternal and child welfare, public health, and unemployment.
b) The main idea is represented by the topic sentence. It introduces the theme of a passage. It is supported by other ideas that provide evidence and examples. This function is ably and accurately performed by sentences 2 to 8 in this passage.