Answer:Key
Explanation:
In cryptography Encryption is the process of encoding the confidential data in such a way that only intended recipient can decode it by decoding it with the help of a suitable key.
Encryption is used in almost every data transmission such that the senders data can only be viewed by receiver without the interference of outsider.
Answer:
The correct option is;
C. They make text larger and bold
Explanation:
The semantic reasons for using header tags which are the benefits users derive from including header tags in content published on the web includes;
1) They give structure to the writing included in the document
2) Header tabs allow text to be broken into sections with different content in focus
3) Header tags are used to add key words to a page
4) To boost search engine optimization SEO
5) To improve visibility.
Well when people do so much working and they feel like they need an emotional break from using their brain, video games give you that relief. Some video games that involve puzzles or questions can help you with finding new ways to solve problems,like in Tetris where it helps you think ahead and how you need to be precise on where putting certain blocks. These games help people think without them knowing you're actually learning new things, because it's just a fun way of learning.
Answer: Worm
Explanation: Worm is the malicious software program which acts as the infection in the computer system. It has the ability to replicate itself and spread in the other systems .It is found in those parts that have automatic operation and non-noticeable.
The effect of the worm is slowing down the operations ,disturb the network etc.Other options are incorrect because virus is the malicious program that infects the host, key-loggers are used for monitoring of system and time bomb is the program for releasing the virus in computer network. Thus, the correct option is worm.