Answer:
Biometrics
Explanation:
Biometrics is the techniques that is used to measure and identify different characteristic of human being that are usually unique in nature for individuals such as voice characteristics, eye retina and finger prints. These features are unique for every person. These features could be used for different purposes now a day such biometric identification, biometric verification and for forensic purposes.
There are different algorithms to compute and compare these unique characteristics for each user and store in a database for the purpose of identification of the users. This data can also be used for forensic purpose if needed by some security agency to identify some person.
The type of identification in which these features such as voice, finger prints and iris pattern use is called biometrics.
It's easier to send the files that way because you don't have to attach them individually, and then your friend won't have to download them individually - they can just download the zip package and have all four right at their disposal.
Question 1: Best way is option 1, Worst way is option 4.
Question 2: Best way is option 4, Worst way is option 3
