Earth is the only planet out of the two that can support life. Mars can not. Both Earth and Mars are both planets. Mars is hotter than Earth. Earth has a moon. Both planets are made up of rock. They differ in colours.
Hmm...an easier way to find a theme of the story would be either scheming through the story looking for clues or facts or read it.
I hope this answer helps.
Couplet = couple = 2 lines
Quatrain = quadruple = 4 lines
Sestet = 6 lines
Octave = octagon = 8 lines
Thats how I try to remember it.
Uuuuuuuuuuuuuhhhhhhhhhhhhhh burger?
The 3rd one. I hope this helps :)