Final answer:
Sergey Bubka was the Ukrainian pole vaulter who won 6 consecutive world championships in pole vault from 1983 to 1997.
Step-by-step explanation:
The correct answer to who was the winner in the pole vault during 6 straight world track and field championships from 1983 to 1997 is Sergey Bubka. He was a phenomenal Ukrainian pole vaulter known for setting numerous world records throughout his career. None of the other options provided (Vitaly Petrov, Yuriy Sedykh, Ivan Ukhov) had similar consecutive victories in the era specified.