All options here, except for the third, make little or no sense. But the third, stating that "The radius is a line segment from the center point to the surface of the sphere" is perfect. Note that in 2 dimensional geometry it'd be "The radius is a line segment from the center point to the rim of the circle."
The statement that is true about the radius of a sphere is:
The radius is a line segment from the center point to the surface of the sphere.
<h2>Step-by-step explanation:</h2>
We know that the radius of a circle/sphere is a line segment that joins the center of circle/sphere to any point on the circumference/ surface of the circle/sphere.
Also, in a circle the radius is the length such that each point on the circumference are equidistant from the center of the circle.
