Solution:

• Virus – a piece of code which is capable of copying itself and destroying data.

• Worm – A computer worm is self-replicating malware that duplicates itself to spread to uninfected computers.

• Spam is any kind of unwanted, unsolicited digital communication, often an email, that gets sent out in bulk. Spam is a huge waste of time and resources. Spam can also be found on Internet forums, text messages, blog comments, and social media. Email spam, however, is by far the most prevalent, and often the most threatening to consumers.