refers to enlarging jobs by combining several relatively simple jobs to form a job with a wider range of tasks.

This is known as job extension.

Explanation:

A job extension or job enlargement, refers to expanding a job's range by adding duties or responsibilities, mostly similar to the current responsibilities regarding that certain position.

It is the result of combining simple jobs in order for it to have a wider range of similar tasks.

answer; the changing age structure of the population;

yes he has a little extra