Final answer:
The term for the anticipated average lifespan of a person based on the time and conditions of their birth is known as life expectancy. It varies widely based on factors like healthcare, nutrition, and social stability, and it is merely an average, with individuals often living longer.
Step-by-step explanation:
The term for the number of years a person is anticipated to live based on conditions at their time of birth is life expectancy. This average lifespan can vary greatly depending on a variety of factors, including gender, year of birth, and the conditions of the country where the person is born. It is influenced by several elements such as healthcare quality, nutrition, clean water, sanitation, and social stability. For instance, in developed countries like Australia, life expectancy at birth in 2013 was 79 years for males and 84 years for females. Contrarily, countries with fewer resources or ongoing conflicts may have lower life expectancy rates.
It's important to note that life expectancy is just an average; many individuals live longer than the projected age. An example of this trend is that by the year 2050, it's projected that half a million Americans could be 100 years old or more. Life expectancy is subject to change and can be affected by a wide range of factors, including lifestyle choices, medical advancements, and environmental conditions.