Update Chapter 3.md
Update Chapter 3.md
griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit,griddynamics/Behavior-Analytic-Starter-Kit