Water is considered a polar molecule because it
has the ability to freeze
is made up of hydrogen and oxygen
has a partial positive and negative charges at each end

The polarity of a water molecule comes from the uneven distribution of electron density of hydrogen and oxygen atom. The oxygen in the water molecule is more electronegative than the hydrogen. Water has a partial positive charge near the hydrogen atom and a partial negative charge near the oxygen atom. The result of this electrostatic attraction results in the bond called hydrogen bond. Also, because of this bond, it has the ability to dissolve most of the solutes due to its polarity and bonding.

Iwould have to say sorry i can't elaborate more. hope this though!