How can Skinner's Behaviorism Theory be seen in this case below? I really appreciate any help you can provide.

Greta is a 32-year-old single woman who has recently begun dating someone new and believes they could really have a future. There is just one problem. Greta is very afraid of dogs. Her new love has 3 enormous Leonbergers and has said that life wouldn't be worth living without animals around. Greta knows she has to change.

When Greta was six years old, while she was walking the two blocks to school all by herself, a beautiful shiny black dog was in a yard along her path. Delighted, she opened their gate and rushed to the dog. The dog charged at her and gave warning barks but Greta just wanted to pet it and kept coming. The dog bit her on the shoulder and shook her, and dragged her around the yard, not releasing her until a passer-by pulled the dog off her and called 911. Greta sustained some injuries from the bite and had a shoulder surgery to repair a ligament. Throughout the rest of her childhood, Greta developed more and more fears. First, it was anything about hospitals and dogs, other black animals, then loud noises, sirens, and first responders, and she struggled with wetting accidents due to fears for quite some time as a child. In college Greta worked through some of her anxieties with a counselor, but she did not address her dog fears as she claimed, "I have just become really good at avoiding dogs."