What do you observe about the relationships between mining centers and railroads ?

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

i’m   sure probably just geuss and see which one you can get right, i’m pretty sure it is the combination of goods and services

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.

no because it could make the world a terrible place to live in.