As an application of cryptography, digital Signatures and MACs can be used for. (1) Authentication
(2) Confidentiality
(3) Integrity
(4) Availability

Correct

(3) Integrity

Explanation:

Digital signature is a simple way of imprinting signature on a digital document. The aim could vary from showing that the document is coming from the right source to showing the integrity of the documents which was sent to the receiver.

well if you have a lion for example it will kill you and that's why you shouldn't have and exotic animal

idk good luck

explanation: