Answer: I think it is either #1 or #2 not sure.
Explanation: I took the exam and I chose the 3rd option and I got it wrong. It is not made from light material. Anyway I think it's 1st more than the 2nd. Good day!
Duro?
Working hard is " trabajando duro"
primero se quema el plástico y luego se forma una bolsa de plástico