Explain the two most important developments of the 1920s and what reaction there was to the developments
two paragraphs pl

I’m not sure if you mean technological and economic development or just products coming out kind of development.

Well I’m not gonna write out two paragraphs but some important tech and economical developments were:

The radio became widespread. It was welcomed by the public and by 1934 almost 60% of the US had radio access. Sports events, news, dramas and more were broadcasted through the radio.

Stock markets across the west developed negatively. On Black Tuesday, stock markets crashed, sending the world into the Great Depression.