According to Tilmann Vetter, the core of earliest Buddhism is the practice of dhyāna. Bronkhorst agrees that dhyana was a Buddhist invention, whereas Norman notes that "the Buddha's way to release [...] was by means of meditative practices." Discriminating insight into transiency as a separate path to liberation was a later development.
Buddha's way to release was by means of what type of practices? 
{'text': 'meditative', 'answer_start': 219}