Final answer:
The functionalist perspective posits that competition among religious groups and the challenges of secularization force religions to work harder to win followers, thereby strengthening the various groups and countering any trend toward secularization.
Step-by-step explanation:
The correct answer is a) Functionalist. The functionalist perspective views religion as a social institution that provides social support, networking, and a sense of belonging to individuals. It emphasizes the importance of religion in promoting social cohesion, reinforcing social norms, and regulating behavior. According to this perspective, religion strengthens various religious groups and counters the trend towards secularization through competition and attracting followers.