How can encryption be used to ensure message integrity?

Answer: Encryption technique is the method for encoding of the information or confidential data which can only be used by the authorized user. The decryption of the message is done by the key that is provided to the authorized party.

Integrity is the property which makes sure that the data is secured and non accessible by the unauthorized party. Thus, encryption makes sure that data does not gets accessed by unauthorized unit that is assuring about the data integrity.