A lion's roar can be heard five miles away The lion has the loudest roar of all the big cats. It's so loud it can reach 114 decibels (at a distance of around one meter) and can be heard from as far away as five miles.

The volume has to do with the shape of the lion's larynx. The lions' square and flat vocal cords allow them to respond easier to air passing through. Therefore, they produce a louder roar with minimal effort.

Explanation:

fairly positive it is 4

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.