Answer:
Explanation:The working-age population in a region consists of those in a range of ages, typically 18-64 or 15-64, considered able and likely to work. ... This number is the number of capable employees available in an economy, a country, ... those who are actively employed but are outside of the designated age range.
The answer is a Natural Experiment.
A natural experiment takes place in natural settings and are used when independent variables can't be manipulated directly for ethical/practical reasons, so in this case the toddlers playing. Any effect observed happens naturally. They aren't seen as true experiments as the independent variable (toddlers playing) hasn't been changed deliberately to see effect on dependent variable (aggressiveness).
The answer is 1). Increase farm and factory output :)
Hope this helps!
