Which of the following best defines negligence?

Negligence is best defined as the failure to exercise reasonable care under similar circumstances. This definition highlights the concept that individuals or entities have a duty to act with a certain level of care that a reasonable person would exhibit in comparable situations. If this standard of care is not met and as a result, harm or injury occurs to another person, this can be classified as negligence.

The focus on "reasonable care" is crucial, as it distinguishes negligence from other types of wrongful acts. For instance, the act of causing intentional harm to another is categorized as intentional tort, which is significantly different from negligence. Additionally, while failing to provide adequate training to employees could contribute to a negligence claim, it is not a comprehensive definition in itself. Finally, breaking a law or regulation does not inherently constitute negligence unless it relates directly to the failure of care expected in particular situations. Therefore, the chosen definition appropriately captures the essence of negligence in legal terms.