It increased unemployment and created a generation of transient workers.
Explanation:
According to the excerpt from a June 30, 1935, letter from Caroline Henderson, the mass emigration of people in America is described and the statistics given is quite staggering as quite a good number of people left and went to other places in search of a better life.
The following ways the environmental challenge depicted in the passage most influence the economic conditions of the 1930s for affected American populations is that it increased unemployment and created a generation of transient workers.
