1. The demographic transition is a process
with several

and every
is in one of the
stages.

i'm asking the same thing i asked this other cat all of

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

the constitution gives congress the power to regulate commerce "among" the several states.