To create a three-dimensional object like an orange, you would need to rotate a specific shape around an axis.
Among the given options:
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Right triangle: Rotating a right triangle around one of its sides will create a three-dimensional object, but it will not resemble an orange.
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Square: Rotating a square around an axis through its center will create a three-dimensional object, specifically a cube, not an orange.
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Hemisphere: Rotating a hemisphere around its flat circular edge will create a sphere, which is similar in shape to an orange.
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Rectangle: Rotating a rectangle around one of its longer sides will create a cylinder, not a spherical object like an orange.
The correct choice is Option #3: hemisphere, as it can be rotated to create a sphere, which closely resembles an orange.