Life expectancy indicates what regarding a certain group of individuals?

Life expectancy is a statistical measure that reflects the average number of years a person can expect to live based on certain demographic factors, including their current age. It does not denote a maximum age or a fixed lifespan, but rather provides an estimate based on the mortality rates within a population at a specific time.

This average lifespan is calculated using mortality data, and it changes with advancements in healthcare, lifestyle improvements, and other societal factors. This means that for individuals within a certain age group, life expectancy offers insights into how long they are likely to live, rather than setting a minimum or maximum age or indicating the occurrence of specific illnesses.

Thus, when considering the context of a group of individuals, life expectancy provides a meaningful indication of their average lifespan from their current age onwards, which aligns directly with the correct answer.