Final answer:
Without specific revenue figures for the business sectors listed, it is not possible to determine which sector generated the highest revenues in 2020. Manufacturing and industry are significant, but the effect of the pandemic on restaurants and retailers suggests they didn't lead in revenue generation.
Step-by-step explanation:
The business sector that generated the highest share of revenues in 2020 is not definitively identified by the information provided. However, it is important to note that major economic sectors like manufacturing and industry are significant contributors to the gross domestic product (GDP), with manufacturing and industry accounting for nearly one-third of GDP and providing jobs to almost one-fifth of the total workforce. This indicates a strong performance in these sectors. Additionally, the apparel and transportation sectors are mentioned, but without specific revenue figures, it's challenging to ascertain which sector led in 2020. Moreover, restaurants and small retailers had steep drops in revenue due to the pandemic, suggesting they would not be the highest revenue-generating sectors.