Laws is a advanced way of saying "Rules", lets start from the beginning when Human settled down and so, there should be rules for not making the mistakes,
For example: Your tribe has a cave with bears nearby, and you should have a Law or rule about not entering the cave right?
If you are an adult maybe you know that kids don't know the danger of something and they still do it, so you need to make a rule and a punishment for breaking the rule, to example, kids shall not play with toilet, because it is a dirty place. And if someone does that, she or he will not get candy this Saturday.
it has changed peoples lives
it has changed peoples life by becomign famous on tv,
Shockingly.
to cook
Its changed our lives by making mining easier
no it dint
Gives children an education.
because...
It effected people's lives by making, different materials with it.
the first automobile changed many peoples lives because that meant they wouldn't have to walk.Transporttaion made it very easy to get around!
Famous physicist Albert Einstein changed peoples lives by changing the way we look at science. He developed the theory of relativity.
Fair trade has changed the lives of people in the third wold by giving them money from the products they produce. I hope this helps.