Which of the following is NOT a human cause of fires?

The correct answer identifies technical malfunctions as a factor that is not classified as a human cause of fires. Human causes of fires typically stem from direct actions or inactions attributed to individuals. Careless actions, such as improperly discarding flammable materials or leaving a stove unattended, fall squarely within human error. Irresponsible actions encompass behaviors that neglect safety protocols, contributing to fire risks due to an individual's choices.

Omissions, which refer to failures to perform necessary actions that could prevent a fire, are also a human aspect, as they result from decision-making (or lack thereof) by individuals responsible for safety and fire prevention.

In contrast, technical malfunctions are often related to equipment failures, such as faulty wiring or mechanical breakdowns, which are not directly caused by human behavior. Understanding this distinction emphasizes the importance of recognizing that while human actions can lead to dangerous situations, technical issues arise from the inherent risks within the systems or machinery, rather than from a person's direct conduct.