The answer is either sugar or tobacco as they were both essential crops to the Caribbean Islands economy.
The biosphere is all living things on earth
Well, it almost sounds like a rhetorical question. Who can? Well, probably someone higher in power with the help of technology. They already have cameras being built into the suits due to the reports of unfair treatment from police officers. We could possibly have people from the government watch over footage from the cameras or have supervisors go with them. Anyway, that's my possible answer/opinion to that subject. Maybe that can give you some insight (-:
Answer: D. They are affordable for everyone to install.
Explanation: I hope this helps :)