Which type of disasters are categorized as natural phenomena?

The correct choice is categorized as disasters resulting from natural phenomena. Floods and fires can occur due to various environmental factors, such as heavy rainfall or lightning strikes, which are unintentional and part of the natural world. These events are classified as natural disasters because they stem from natural processes and can impact human activities, infrastructure, and the environment significantly.

In contrast, malicious attacks stem from human actions intended to cause harm, making them man-made disasters. Technical failures usually arise from equipment malfunctions or errors in systems, while operational incidents occur due to internal factors within an organization, such as procedural lapses. Neither of these categories captures the essence of disasters that originate from natural events.