The correct option is D Source: Sun, Screen: Land
A shadow is formed on a screen when an opaque object blocks the path of light. In the given scenario, the Sun is the light source, the flag is the object that is blocking the path of light, and the land is acting as a screen on which shadow is formed.
A shadow forms on a screen when an opaque object blocks the path of light. In the given scenario, the Sun is a light source, the flag is an object that blocks the path of light, and the land acts as a screen on which a shadow forms.