Concept:Increase in farm produce depends on factors that boost actual output, not on marketing activities.
Explanation:Improved crop varieties increase yield per hectare.
More manure and fertilizer improve soil fertility and plant growth.
Better farm equipment and tools make farming faster and more efficient.
These three options all contribute directly to higher farm output.
Improved sales of crop and livestock only affects income and market access.
It does not increase the physical quantity of farm produce.
Answer:C. Improved sales of crop and livestock