Step 1: Define secularization.
Secularization is the process by which religion loses its influence over social, political, and personal life. It involves decline of religious authority and growth of rationality and scientific outlook.
Step 2: Evaluate options.
- (A) Privatization of religion → an aspect of secularization (religion becomes a private matter).
- (B) Rising level of membership of religious organizations → NOT an aspect, because secularization involves decline, not rise, in religious participation.
- (C) Loss of social and political influence of religious organizations → a central aspect of secularization.
- (D) Belief in magic and supernatural forces → contrary to secularization, which emphasizes rationality and decline of superstition. Hence, NOT an aspect.
Thus, the correct answers are (B) and (D).