At the beginning of the twenty-first century, some people placed signs with crudely painted skeletons holding cell phones near roadways, usually facing freeway ramps. These signs indicated disapproval of using cell phones while driving, a practice some states have now made illegal. As a result of these laws an informal has become a law.

The answer is norm.

Refer below for the explanation.

Explanation:

Therefore,

At the beginning of the twenty-first century, some people placed signs with crudely painted skeletons holding cell phones near roadways, usually facing freeway ramps. These signs indicated disapproval of using cell phones while driving, a practice some states have now made illegal. As a result of these laws an informal norm has become a law.

Norm is a pattern or a general rule.

taking a bath requires the most water out of the given options because it takes a significant amount of water in order to fill a bathtub.

the template that is used is page layout then the margins option and finally choose the normal option.