Which of the following is considered a non-conventional threat?

A non-conventional threat is characterized by methods of warfare or attack that do not conform to traditional military practices. Cyber attacks exemplify this definition well, as they involve the use of technology and the internet to disrupt, damage, or gain unauthorized access to systems, often without physical confrontation. Traditional warfare often relies on physical confrontations using known tactics and weapons, such as firearms or conventional explosives, which makes them conventional in nature.

In contrast to non-conventional threats, standard military warfare involves organized and regulated tactics, while firearms and conventional explosives are typical tools used in conventional military operations. Cyber attacks contrast with these methods as they operate in the virtual space and can affect military and civilian infrastructure without direct physical interactions, thus representing an emerging class of threats in the realm of security. This unique characteristic of cyber attacks aligns it with the designation of a non-conventional threat.