developed nations tend to have better healthcare, greater wealth and more education. because of these three…

Brief Explanations:

Developed nations have better healthcare (which contributes to higher life expectancy as people can get better medical treatment and live longer), greater wealth (which often leads to more resources being allocated to family planning and education about family planning, thus reducing the crude birth rate and total fertility rate as people are more likely to have fewer children when they have more economic stability and access to contraception etc.), and more education (educated people are more likely to understand the benefits of smaller family sizes, plan their families, and have access to information about family planning methods, which also helps in reducing the crude birth rate and total fertility rate).

Answer:

They have a higher life expectancy, lower crude birth rate, and lower total fertility rate.