How do the clouds stay white and stay in its shape?

Question: How do the clouds stay white and stay in its shape?
- Keywords:
  cloud,
  shape
Asked by 687pnug24 to Huma, Jack, Lucy, Miranda, Peter on 14 Nov 2016.
- Peter Boorman answered on 14 Nov 2016:
  
  HI 687pnug24,
  
  I’m not 100% sure, but I think the right balance of pressure and temperature that high up in the atmosphere is what makes clouds keep their particular shapes!
  
  Peter

Question: How do the clouds stay white and stay in its shape?