What condition can be caused by overwatering plants?

Overwatering plants can lead to root rot, which is a serious condition where the roots of the plant begin to decay. This occurs because excessive moisture in the soil creates an environment that is conducive to the growth of harmful pathogens, particularly fungi. The roots are suffocated and their ability to absorb water and nutrients is severely compromised, leading to a decline in plant health.

In contrast, while pest infestation and fungal infection can be associated with overwatering, they are not direct consequences and can arise from various other factors as well. Leaf scorch typically occurs due to environmental stress, such as drought or high temperatures, rather than being related to excess water. Thus, root rot is the most appropriate condition linked directly to overwatering, highlighting the importance of proper watering practices for healthy plant growth.