Which climate related characteristics would be essential for the production of grain, rice, tobacco and indigo?

Whether or not a given study has the possibility of causing harm to participants:

Because of the housing bubble, many houses are now selling for much less than their selling price just two to three years ago. there is evidence that homeowners with virtually identical houses tend to ask for more if they paid more for the house. what fallacy are they making?

The romans believed every human being deserved rights, even slaves. true or false