Iran’s warning to Israel about a ‘decisive response’ if they cross ‘red lines’ indicates escalating tensions between the two countries. This could mean if Israel takes certain actions against Iran’s interests that Iran perceives as crossing a boundary or threshold, there would be significant consequences, potentially military response. The term ‘red lines’ is often used in diplomacy to refer to a point that a country has specified that they would not tolerate being crossed. The specifics of the ‘red lines’ set by Iran have not been detailed in this statement. It’s advisable to monitor reliable news sources to keep updated with this situation.