What was a cause of decreased demand for food in the 1920s?

According some author the cause was  the  decline of agriculture.

Explanation:

The decline of agriculture in 1920 had different causes as:

1)Overproduction.  It was linked with by several others factors like overly efficient machines.  

2)Governments polices. US in that time was trying to sell its abundance of goods to foreign countries.

3)New Machinery. The new technology that was invented such as tractors produced that farmers losing their jobs.  

4)The effects of World War I. It was not directly but after an efficient context it was start to decline.  

I would say  increased farming income

Explanation:

Makes the most since.

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.