Venice has problems with pollution and a geological phenomenon in which the ground sinks
Free market because it is a system based on demand with little or no goverment control.
I think your question is: after which Genocide was this the case?
It might have been more than one genocide, but it was definitely the case in the Rwandan Genocide. Specifically it is estimated that around 100 000 children live in such households. (but his data is from 2003, so in the meantime those children grew up)
Answer:
I think it is a, cash crops, or c, luxury crops