Final answer:
Kraftwerk, a German band from Düsseldorf, was pivotal in developing electronic music in the '70s, influencing various music genres with their use of synthesizers and drum machines.
Step-by-step explanation:
The influential German band from Düsseldorf that pioneered the development of electronic music in the '70s is Kraftwerk. This band was renowned for their electronic sound, which utilized synthesizers and drum machines, and they played a pivotal role in the formation of electronic music as a genre.
Their innovative style influenced various music genres and their sound was a precursor to numerous electronic music styles that emerged later on.