Step 1: Define secularization.
Secularization is the process of explaining religion in rational, societal, or historical terms rather than supernatural.
Step 2: Contrast with other options.
Sanskritization, Westernization, and Modernization describe social change, not the logic behind religion.
Step 3: Conclude.
\[
\boxed{\text{Secularization (Option B) provides logical explanation of religion.}}
\]