The correct answer is C. (Ik it's correct because I just answered it)
I suppose it is the density, having more pockets of air in between the granules of sawdust. Air has oxygen. What does a fire need to strive? Oxygen.
The choices can be found elsewhere and as follows:
<span>Osmosis
Active Transport
Passive Transport
Facilitated Diffusion
I think the correct answer is the second option. The process that would be necessary is active transport. </span><span>Transport of materials against the concentration gradient requires energy which is active transport.</span>