What is true about the average age of fertility in lower developed countries?

The average age of fertility in lower developed countries is generally lower than in developed countries due to several factors, including differing societal norms, economic conditions, and access to education and healthcare. In many lower developed countries, cultural practices and economic needs often encourage early marriages and childbearing, contributing to earlier average ages of fertility.

This contrasts with developed countries, where factors such as career development, education, and access to contraception lead individuals to delay starting families, resulting in a higher average age of fertility. The stark differences in these patterns highlight how varying degrees of development and cultural contexts influence reproductive behaviors and decisions.

The other options do not accurately reflect the established data surrounding fertility rates. For instance, fertility rates may show correlations with death rates and are certainly influenced by cultural factors. Additionally, stating that the average age of fertility is always above 45 is factually incorrect, as most fertility occurs much earlier in life.