Option C. Weight, Friction are the vertical forces that act on the leaf falling.
<h3>What are vertical forces?</h3>
These are forces that act in the vertical plane, which is perpendicular to the ground. There are at least two vertical forces acting. Gravitational force is provided by the earth and always acts downwards.
The weight, W (force) acting on the leaf is as a result of the product of the mass(m) of the leaf and the acceleration due to gravity (g).
Mathematically; W = mg
Friction in the form of air resistance also try to stop or reduce this acceleration due to gravity (g) on the falling leaf and it acts upwards.
In conclusion, Weight and Friction (air resistance) are the two vertical forces acting on a falling leaf.
Learn more about forces: brainly.com/question/12970081
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