Final answer:
Cohesion is a special property of water that allows insects like water bugs to walk on the surface of water without sinking.
Step-by-step explanation:
One special property of water is cohesion. Cohesion is the attraction between water molecules due to hydrogen bonding. This property allows water bugs or insects to walk on the surface of water without sinking. The cohesive forces between water molecules create surface tension, which supports the weight of the insect.