Answer:
The answer to the questions is below;
1. 
The Great Leap Forward began following what other plan for industrialization by Mao? 
Answer: Five Year Plan
2. 
The Chinese government organized peasants into communes in order to increase ___ production and to keep control of the peasants. 
Answer: Agricultural
3. 
Which key technical innovation of the Great Leap Forward proved enormously ineffective?
Answer: Backyard furnace
I hope the answer was helpful.
Thanks for asking.