Anupriya has observed many examples of forces acting around her. She has listed the examples into three groups based on which kind of force acting: Group 1 : A car screeching to a halt, a matchstick lighting up when struck.
Group 2: A woman skiing down a mountain slope, the rise of ocean tides.
Group 3: A ship floating in the ocean, a parachute slowing the fall of a sky diver.

In which group Anupriya should put falling of a tree.
Group 1

Group 2

Group 3

None of the above