A revolving gas lantern enclosed in red and green glass, installed on a street corner in London in 1868 to regulate buggy and wagon drivers and pedestrians, was an early ________ of the modern traffic light. aberration
accelerated
artisans
avail
caprice
conjecture
context
crescendo
deviate
excrescence
incur
interjection
intervene
obituary
precursor
recant



Answer :

"precursor" is the correct answer. It means someone or something that came before