Answer:
option d: can be accomplished by clicking one's tongue
Explanation:
Echolocation can be defined as a human unique capabilities or ability to notice (detection) objects in their environment through echoes sensing from those objects, by normally giving or creating sounds. Example is using your mouth to make clicking sound, tapping your foot.
In this case we can infer that, by decreasing the demand (population), the supplying of clothes increases, generating a decrease in the prices of the products, thus causing the demand curve to move to the left, causing the bidders to reduce production costs.