What is the difference between a) prokaryote and eukaryote; b) autotroph and heterotroph; c) unicellular and multicellular?

Explanation:

a) eukaryotes have membrane bound organelles like nuclei while prokaryotes don't

b) autotrophs = producers that can make their own food while heterotrophs consume producers or other consumers

c) Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function

what following? you said which of the following. but there is no be more specific.

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"