You roll a 20 sided die two times in succession. what is the probability of rolling an even number on the first roll and a number less than 5 on the second roll

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.