Answer :
The main difference between a barcode reader and a biometric input device is that; a barcode reader is to validate barcodes while a biometric device is to validate the identity of human beings.
What are input devices?
A barcode reader is an optical scanner that is an input device that can read printed barcodes, decode the data that are in the barcodes and send the data to a computer.
Meanwhile a biometric input device is a security identification and authentication device that make use of automated methods to verify, identify the validity of a living person based on a physiological or behavioral characteristic through fingerprints, facial images e.t.c
Now the main difference between both is that a barcode reader is to validate barcodes while a biometric device is to validate the identity of human beings.
Read more about input devices at; https://brainly.com/question/1245638?source=archive