Question

my geometry teacher has us draw concentric or commonly centered circles by using a compass so all the circles have the same middle point. our biology teacher tells us that concentric circles often appear in nature; consider the cut trunk of a tree, with its tree rings fanning out from a common central point. i can also create an example of concentric circles—those spreading out from a shared central point—by throwing a stone in a calm pond and watching the ripples form; go try it!
quiz: what is an example of concentric circles?
a. a row of round windows on a ship.
b. the rings inside a tree trunk.
c. two round lenses on a pair of glasses.

Explanation:

The text mentions that concentric circles are those with the same central point. It gives the example of tree rings (from a cut tree trunk) as concentric circles. Option b matches this description. Options a (row of round windows) and c (two round lenses) do not have a shared central point as required for concentric circles.

Answer:

B. The rings inside a tree trunk.