Why is a computer virus more concerning than other types of malware?

A computer virus is particularly concerning because it has the ability to replicate itself within files, which allows it to spread rapidly from one file to another, and potentially from one system to another. This self-replication characteristic means that a virus can inadvertently proliferate as users share files, leading to wider distribution and increased potential for damage. Unlike other types of malware that may damage files or systems but not replicate, a virus can increase its presence and impact exponentially. This makes it a significant threat since even a small, initially contained infection can become a widespread issue very quickly, necessitating extensive security measures to eradicate it.

The other options highlight aspects about viruses and malware, but they do not encapsulate the core issue of self-replication that underscores the urgency and risk associated with viruses. For instance, while some types of malware can operate without a host or an internet connection, it's the replication capability of a virus that poses distinct challenges for detection and removal, making it a particularly pressing threat in terms of cybersecurity.