The value scale shows you the process of getting from the lightest value to the O medium value O second lightest O darkest O second darkest

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.

The answer to your question is a. true.

Maybe ech person had their own set of drawing skills like maybe one person could only do contrasting and the other could do realistic detailing