Final answer:
Water molecules exhibit cohesion due to hydrogen bonding, which is essential for capillary action and biological processes like water transport in plants.
Step-by-step explanation:
Water molecules are cohesive, which also pulls water upward. This property enables water to adhere to itself due to hydrogen bonding, which is crucial for creating surface tension and the ability of water to travel through capillaries in phenomena such as capillary action.
Cohesion in water is vital for various biological processes, including the transport of water from the roots to the leaves in plants.