Why do you think some countries have low rates of obesity while other countries have higher rates? What differences might exist between these countries that would affect the differing rates?

Ibelieve that the answer is (a).

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.