What is a potential consequence of using contaminated water for irrigation?

Using contaminated water for irrigation can lead to decreased plant growth due to the introduction of harmful substances into the soil and plants. Contaminants, such as pathogens, heavy metals, or toxic chemicals, can inhibit the plants' ability to absorb nutrients and water effectively. These contaminants can also damage plant tissues or disrupt essential physiological processes, ultimately resulting in stunted growth or even plant death.

On the other hand, options that suggest increased crop yield, enhanced soil nutrients, or better pest control do not align with the impact of using contaminated water. In reality, rather than improving yields or enhancing nutrient levels, contaminants typically degrade the quality of both the soil and crops, leading to poorer agricultural outcomes.