PLS HELP THIS IS URGENT
can anybody describe what the US was like in stages 1,2,3, and 4?

What causes heat transfer in fluids

The world wars of the twentieth century immediately led to a. the establishment of a communist bloc in eastern europe b. the urbanization of europe’s societies c. an emphasis on humanism d. an emphasis on ties to greek and roman societies select the best answer from the choices provided. a b c d

Which barrier to economic development is shown in the following examples?