The correct answer is "it went down, causing a drop in food production and famine."
Based on the graph, the conclusion that best describes grain production during the Great Leap Foward from 1958-1960 is that "it went down, causing a drop in food production and famine."
What the graph depicts is grain production by China during the period called the Great Leap Foward and the Five Year Plan.
Communist in China created a five-year plan in 1958 to implement a solution to the agriculture problems og that time. The government reorganized the population to better work on the fields and increase production.