What does 'disease' refer to in a broad sense?

The term 'disease' broadly encompasses a range of conditions that can disrupt the normal functioning of living organisms, including both plants and animals. It is recognized not just as a specific type of illness, but rather as a category that can include various ailments and disorders that can affect physiological systems.

By selecting the option that identifies disease as an ailment affecting both plants and animals, you align with the understanding that diseases can manifest in numerous forms across different species. This definition encompasses a variety of conditions, such as infections, genetic disorders, and even psychological issues, which can all be considered diseases in some contexts.

The other options, while they describe specific types of conditions, do not capture the broader definition of 'disease' as effectively. A psychological condition is a subset of diseases related to mental health, a genetic disorder is one specific kind of ailment, and a type of infection is yet another category within the overall framework of diseases. Therefore, identifying disease as an ailment affecting both plants and animals acknowledges its extensive range and diverse impacts.