How can i compare the challenges facing farmers and workers in the 1900s to their challenges today?

Try making a vein diagram and compare maby make a t chart 
or think of one think like bugs and think of the things they did before and the things we do now example we could use a chemical to kill the bugs on out crops and before they needed to look at the crop so on and so forth 
 

Aproverbs i hope this

The exchange of foods between the new and old worlds