Final answer:
Webern's compositional style includes sparse textures, brevity in compositions, and a departure from traditional tonal and harmonic structures.
Step-by-step explanation:
The compositional style and body of work of Anton Webern can be characterized by certain distinct attributes. The correct statements about Webern's style would be: a) Sparse textures and brevity in compositions and d) Heavy reliance on tonal and traditional harmonic structures. Webern was known for his concise, focused pieces that often eschewed long, flowing melodic lines in favor of more succinct, abstract expressions. In contrast to the elaborate orchestrations with extensive use of percussion, Webern's work is generally more subdued, employing a limited array of sounds to create his desired effect. Additionally, Webern was a pioneer of the Second Viennese School, exploring atonality and twelve-tone techniques, which mark a significant departure from heavy reliance on tonal and traditional harmonic structures.