Answer:
5. Their intentions are sometimes benign and motivated mostly by curiosity, but their actions are typically in violation of the intended use of the systems that they are exploiting.
Explanation: I used the coordinating conjunction "but" to show a contrast between their intentions and their actions. It emphasizes that despite having benign intentions driven by curiosity, their actions still deviate from the intended use of the systems.
6. Their meddling often creates problems for users, which can include the downloading of malicious code such as viruses, worms, and Trojan horses.
Explanation: I used the dependent word "which" to introduce a dependent clause that explains the problems created by their meddling. It clarifies that the problems can involve the downloading of malicious code, including viruses, worms, and Trojan horses.
7. Some people use the terms viruses, worms, and Trojan horses interchangeably, yet each has unique characteristics.
Explanation: I used the conjunctive adverb "yet" to indicate a contrast between the interchangeable usage of the terms and the fact that each term possesses distinct characteristics. It highlights the distinction between the terms while acknowledging their interchangeable usage by some individuals.
8. A virus is a type of malicious code that requires the user to actually do something before it infects a computer.
Explanation: In this case, I used the dependent word "that" to introduce a dependent clause that provides additional information about a virus. It specifies that a virus necessitates the user to perform an action before it can infect a computer.