Question

What feature makes water a polar molecule?

Answer 1

I think its because  the molecule is V shaped and the lone pairs  on the oxygen atom  strongly attract the electron on the hydrogen atoms producing a partial positive charge formed on each H atom.

Answer 2

In the covalent bond between oxygen and hydrogen, the oxygen atom attracts electrons a bit more strongly than the hydrogen atoms. The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.