B. Communist dictatorships is the odd one out.
Answer:
Disadvantage
Explanation: It can become active anytime
(Please vote me Brainliest if this helped!)
Water footprint: (noun) the amount of fresh water utilized in the production or supply of the goods and services used by a particular person or group.
Basically, it's a measure of humanity's appropriation of fresh water in volumes of water consumed and/or polluted.
B; As far as the relation between humans and the environment, it is obvious how much they relied on it. Not only as a food source, but for economic growth and sustainability as well. The other answers make valid points but in the context of this question, the only one that even mentions the relation is B.