Final answer:
Newspapers faced the most challenges in the print publishing industry in 2020 due to a consumer shift to digital news sources and insufficient digital ad revenues to offset print losses.
Step-by-step explanation:
The segment in the print publishing industry that faced the most trouble in 2020 was newspapers. This decline can be largely attributed to a shift in consumer behavior, as more people, especially the younger demographic, have started to rely on digital and online sources for their news. The Pew Research Center has documented the increasing trend of news consumption through smartphones and tablets, underscoring the challenges for print media. Print newspaper circulation peaked in 1973, and there has been a continuous fall since then. By 2012, the percentage of Americans receiving their news from print sources had plummeted to 29%. In a bid to adapt, newspapers have developed internet versions, but the competition from free news sites and blogs, as well as the insufficient digital ad revenue, have not been able to fully compensate for the losses in print revenue.