A duck swims from the edge of a circular pond to a fountain in the center of the pond. Its path is represented by the dotted line in the diagram below. What term describes the duck's path?

STEP - BY - STEP EXPLANATION
What to find?
The term that describes the duck's path.
Given
Step 1
Observe that that the duck's path subtended from the center to a point on the circumference of the circle.
Step 2
Determine the name for the path.
Any line that subtends from the circle to any point on the circumference is
radius.
ANSWER
Radius.