which figure shows a diameter?

which figure shows a diameter?
Answer
Explanation:
Step1: Recall diameter definition
A diameter of a circle is a straight - line segment that passes through the center of the circle and has its endpoints on the circle.
Step2: Analyze each figure
The first figure has a line segment that does not pass through the center. The third figure has no line segment shown. The fourth figure has a line segment that does not pass through the center. The second figure has a line segment that passes through the center of the circle and has endpoints on the circle.
Answer:
The second figure.