Which categories of goods used by ordinary people are most affected by scarcity?

The answer tot his question is non-durable goods
non-durable goods refers to the type of goods that will become unusable within a  short period of time (such as foods)
In scarcity conditions (such as during natural disaster), this type of food will become really valuable in order for the victim to survive.

C. equitable; undue influence

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.