Final answer:
The chance of identifying and warning about a tornado has improved over time due to improved forecasting technology.
Step-by-step explanation:
The statement suggests that the chance of identifying and warning about a tornado has improved over time due to improved forecasting technology. In the 1980s, the chance of identifying and warning about a tornado was only thirty percent, but now it is seventy percent. This increase could be attributed to advancements in radar technology, weather models, and data analysis techniques.