Glacial episodes are an example of
a. positive feedback
b. negative feedback
c. the “daisy model”
d. the gaia hypothesis

I think the correct answer from the choices listed above is option A. Glacial episodes are an example of a positive feedback. Each glacial period in the Earth is subjected to a positive feedback which makes each period more severe. Hope this answers the question.

Proteins vitamins and a carbohydrate is a atom