Please answer only this question: Identify the area of law involved and the legal issue(s) presented

Mr. Worton purchased a slide for the familys four-foot-deep aboveground backyard pool from Jacuzzi Canada Inc. A Jacuzzi Canada employee told Mr. Worton that installing this kind of slide with his pool would be okay and not a problem. He was not advised hat there was any risk at all in doing so. Worton installed the slide according to the instructions. Unfortunately, Carla, his 15-year-old, was seriously injured when she went down the slide headfirst and as a result is now paralyzed. Carla had been instructed by her parents only to go down the slide feet first, but on this occasion, she failed to follow this rule. Carlas parents have sued Jacuzzi on her behalf.