Which factor is NOT a trend affecting cremation?

The factor that is not considered a trend affecting cremation is the increased religious opposition. While it is true that certain religious groups may oppose cremation based on their beliefs regarding the handling of human remains and the afterlife, this opposition is not a widespread trend impacting cremation rates in the same way as the other factors listed.

In many societies, particularly in the last few decades, there has been a significant increase in cremation rates as beliefs evolve and more flexible attitudes toward body disposition are adopted. The demographic trend of people living longer often leads to an increase in deaths, thus indirectly influencing cremation rates as families seek more varied and personalized memorial options. The growing trend of a more transient population means that families are often dispersed, which can make cremation appealing for its simplicity and the ability to easily transport remains. Additionally, increased environmental awareness has led many individuals to choose cremation over traditional burial, viewing it as a more eco-friendly option.

In contrast, while religious beliefs can influence individual decisions, they do not represent a broader trend that impacts the overall acceptance of cremation across various demographics. Thus, religious opposition does not have the same pervasive effect on the rise of cremation practices compared to the other factors which are changing societal norms and preferences.