Years ago when my daughter was still learning to ski, she would freak out a little when we came across 3D terrain within the trails, gullies or metal tunnels for run off that form rollers of various shapes. She would jet off due to the curvature of the terrain. I told her to hold her stance, when the terrain is starting to go uphill then start squatting down.
I tried to keep it as simple as possible. I think if I told her about tail loading, flexing the ankles or pointing the toes down..... she would think I'm from Mars.
Part of what makes 3d terrain fun is that adaptive movements are often, initially, counterintuitive. It's great that you were able to help her put in place building blocks that could be relied upon in a variety of movement contexts down the road.