Discuss the role of learning in drawing from observation. what is the difference between drawing from observation and drawing from memory?

When drawing from observation, you draw it how it is, not how you think it is. Even if it looks weird, if that’s how it is in the picture/still life then that’s how you draw it. Whereas when drawing from memory, your brain can add in things and change minor details that alter the entire image, just because it looks “right”. Drawing form observation also helps you learn proportions and how highlights and shadows affect a piece.

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.