Question

why does water flow easily

Answer 1

The reason for any liquid to follow with ease is less viscosity. If the viscosity is high, the liquids does not flow easily, like honey.

Answer 2

HEY FRND ☺☜
☛⛤☺A liquid with a low internal resistance to FLOW  is described as having a low viscosity such as water at room temperature
☛⛤☺The internal resistance being referred to is related to the ability for molecules to rearrange and move past each other.
☛☺⛤The internal resistance being referred to is related to the ability for molecules to rearrange and move past each other.
☛☺⛤because water has a lower molecular weight...