Option 1 -> repercussion means an unintended consequence or result of an action, making it a direct synonym.
Option 2 -> extinct means no longer in existence or having died out, not related to consequence.
Option 3 -> anticipated means expected or predicted to happen in the future, not a synonym.
Option 4 -> hazardous means dangerous or involving risk, unrelated to the meaning of consequence.
Hence, Option 1: repercussion -> The word appears in the passage in the context "they have forgotten its repercussions," referring to the consequences or results of technological advancements on the environment -> correct