In general, water is essential for all living beings on the planet, including plants.
Water is essential for plants, because thanks to it, vegetables absorb nutrients from the soil to grow and develop.
When water is lacking, the plants trigger an internal survival mechanism and wither.
Plants have a high percentage of water in their composition, therefore, if they are not watered with water, they die.
Answer:
If you forget to water your plants, the plants wither and die.