Parts of a circle
study the example and then answer each question.
a circle is the set of points that are all the same distance from a center point. a
circle is usually named by its center point. for example, the circle shown is called
circle b
in the example on the left, line segment db is a
circle b.
center
the circle shown has point o as its center.
a. radius
b. circumference
c. diameter

radius

Step-by-step explanation:

From the attachment D is a point on the circumference of the circle and B is the center of the circle.

The question demands the name of line segment DB in circle B.

Any line from the center of a circle to the circumference is called a radius.

Therefore line segment DB is a radius.

The second choice is correct.

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.