Answer:
is found to have solidified in a new shape. And the magic of fire has yet more to offer. ... The use of fire thus makes possible two significant new steps in the development of metallurgy
Explanation:
The passive voice is a verbal construction in some languages for which is presented to the subject as passive, while action taken by the verb is performed by a complement and not by the subject agent the verb in active voice.
Political upheaval in Germany caused people to seek freedom elsewhere wasn't the reason