Explanation:

A mortgagor in possession is generally expected to manage the property as a prudent owner would. They are liable for any act that is destructive or permanently injurious to the property, or for failing to maintain it. However, they are not liable for normal deterioration of the property that occurs due to natural causes or ordinary wear and tear, provided they have not acted negligently or maliciously. Temporary damage or minor destruction, if not due to negligence, might also fall under this, but 'normal deterioration' is the most encompassing and accurate answer for non-liability.