Negligence in Tort Law is defined as:

Negligence in Tort Law is fundamentally understood as the failure to exercise the level of care that a reasonably prudent person would in similar circumstances, thereby leading to harm or injury to another individual. This definition highlights the concept of carelessness rather than intentional wrongdoing.

The focus is on the actions (or lack thereof) of an individual or entity and whether those actions fell short of the established standard of care that society expects, thereby creating a risk of harm to others. When the failure to act appropriately results in injury, the negligent party can be held legally liable for the damages caused.

It's key to note that while other options suggest different aspects of law, they do not encapsulate the essence of negligence in Tort Law. The intentional infliction of harm relates more to intentional torts, while natural disasters pertain to force majeure and unforeseen events outside of a person’s control. Finally, neglecting responsibilities tied to contracts does not fit the parameters of negligence, as it pertains specifically to performance obligations rather than the general duty of care that applies in tort situations.