What are two reasons for the increase in Australia of non-Christian religious affiliation?

Question

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Australia's mass postwar immigration program has brought people from a wide range of religious backgrounds to the country, resulting in an increase in non-Christian religious affiliation. Additionally, the trends in the globalisation of religious and spiritual practices have allowed for more diverse religious beliefs and practices to be shared and explored, contributing to the increase in non-Christian religious affiliation in Australia.

What Are Two Reasons for the Increase in Australia of Non-Christian