The line that is horizontally drawn from the center of a circle is called the radius.
Yes, D is the correct answer. A line horizontally drawn from the center of the circle is called the radius. The radius is a line segment that connects the center of the circle to any point on the circumference. In this case, since the line is horizontal and drawn from the center, it is a radius. To determine the answer, you would need to understand the definitions and properties of the different parts of a circle.