Why are hydrophilic substances made of polar molecules??

Question

Why are hydrophilic substances made of polar molecules??

Answer 1

Polar molecules by definition have a charge - Eg, NaCl  is composed of +ve Na ions and -ve Cl ions. Charged material such as NaCl dissolves in water by interacting with the +ve (H+ ) & -ve (OH-) charges in water. They are water loving because of these interactions = hydrophilic.

Answer 2

because water is polar and polar molecules attract each other, hence the name hydrophilic.

Look at the answer below me. Peter explains it very well.