Answer:
Voluntary
Explanation:
The definition of tolerance gives the word a decidedly voluntary nature because it is described as the willingness to tolerate something.
The government can pass laws that enforce tolerance and make discrimination illegal, but these laws can only punish offenders who do not respect them. The ability that is tolerance is an internal characteristic that only changes from within.
The use of machinery made work easier and more efficient, therefore more raw materials were needed because final products could be produced much faster.
The transport of material due to gravity.
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