What is the difference between p waves and s waves

P waves :

Travel faster than s waves. Travel through any kind of material . P waves are smaller than s waves. They are first waves to hit seismographs . P waves are compression waves .

S waves :

Travel slower than p waves .Travel only through solid objects .s waves are larger than p waves .They are second waves to hit seismograph . s waves are shear waves.

The answer would be (c), mass extinctions