When thinking of Tyagaraja's contributions to tala, the terms 'Desadi' and 'Madhyadi' (another way of starting a composition within the Adi tala cycle) should come to mind. He was a master of rhythmic innovation within traditional structures.
Step 1: Understanding the Concept:
The question asks to identify a tala or a concept related to tala that was particularly popularized or introduced in compositions by the great Carnatic composer, Saint Tyagaraja. Step 2: Detailed Explanation:
While the concept may have existed earlier, Saint Tyagaraja is widely credited with extensively using and popularizing the 'Desadi' tala structure in a vast number of his kritis. The Desadi tala is a specific application of Adi tala where the composition begins after a delay of 1.5 aksharas from the start of the tala cycle. This creates a unique rhythmic gait and is a hallmark of many of his most famous compositions. The other options are general tala types not specifically introduced by him. Step 3: Final Answer:
The Desadi tala is strongly associated with and was extensively popularized by Tyagaraja.