"Trade" can exist outside of the literal meaning. Humans set up many situation where animals just do their thing, but in a manner that benefits the humans (and

"Trade" can exist outside of the literal meaning. Humans set up many situation where animals just do their thing, but in a manner that benefits the humans (and ideally the animal for this to be considered a trade, such as living in a protected environment). Using Giant African Rats as landmine detectors is one such mutually-beneficial trade.