death rates and infant mortality rates are due in large part to technological advances, improved sanitation, and better medical care in developed countries.

Both are Lower

Explanation:

Death rate is also known as Mortality rate.Death rate is the ratio of total deaths to total population in a specific area  or community over a specific time period.Death rate = number of deaths/1000 of the population/year.The death of young children under the age of 1 is known as Infant mortality rate.The infant mortality rate (IMR) meausres the death toll which is the number of deaths of children under one year of age /1000 live births.