What was a significant result of post-World War II immigration into Australia?

The significant result of post-World War II immigration into Australia was the increase in the Catholic population. This period saw a substantial influx of immigrants from predominantly Catholic countries, such as Italy, Poland, and Malta. These communities brought their religious practices and traditions with them, contributing to the growth of the Catholic Church in Australia. Over the decades, this led to a more diverse religious landscape where Catholicism became one of the major faiths practiced, reflecting not only the demographic changes but also the cultural and social influences these immigrant groups had on Australian society.

The other options refer to developments that may have occurred during this period but do not capture the most prominent religious shift resulting from immigration. While Buddhism and Hinduism did see growth due to immigration, particularly from Asia, their rise was not as significant as the increase in the Catholic population during the immediate post-war era. The integration of Islamic practices has also gained prominence, particularly in more recent decades, but it does not represent the immediate post-war outcome in the same way. Lastly, the Jewish presence in Australia, while stable, did not experience a notable decline directly attributed to post-war immigration patterns, but rather had its own historical developments that were separate from this context.