What causes water molecules to be attracted to each other?
a. polar covalent bonds inside each water molecule
b. hydrogen bonds inside each water molecule
c. ionic bonds between water molecules
d. nonpolar covalent bonds between water molecules

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.