Final answer:
Encryption is the process of transforming clear text into unintelligible text to ensure secure storage or communication. It is critical for protecting data's confidentiality and integrity.
Step-by-step explanation:
Encryption is the process of transforming clear text into coded, unintelligible text for secure storage or communication. The correct answer to the question is D) Encryption. By converting the readable data into an encrypted form, it helps protect the data's confidentiality and integrity during transmission over networks or when stored on devices. This is crucial for maintaining privacy and security in various digital communications and transactions.