Final answer:
Musorgsky composed with strong nationalistic elements and an innovative harmonic language, differentiating from the Germanic tradition by using Russian cultural influences.
Step-by-step explanation:
Musorgsky avoided Germanic-style thematic development by composing with techniques that favored strong nationalistic elements and innovative harmonic language. Instead of following the Germanic tradition, Musorgsky, along with other post-Romantic composers, often focused on reflecting the traditions and identity of their own countries in their music. Composers like Mussorgsky took inspiration from Russian folklore, history, and other cultural elements to create a distinct musical voice that diverged from the Western European norm.