Answer: option B - The rate of diffusion increases with the increase in number of particles and temperature.
Explanation:
Gases belong to the states of matter. They are made up of particles loosely attached, and traveling through the entire space of their containing vessel. These travels is known as DIFFUSION.
An INCREASE in TEMPERATURE and PARTICLES would DEFINITELY increase rate of TRAVEL (as particles tends to escape through any available space).
For Example: You must have noticed that on blowing more air into a BALLOON, It tends to burst. So, also heating a gas containing vessel, it EXPANDS and soon burst.
So, the RIGHT ANSWER is option B
