Because it shows the ages of the population, so we can see the parts of the place with the population that can and can't work.
Now, the way these maps show social information is: because they point out the demographical distribution about a specific sub-group in the population, its age, and its growth.
And finally, the way these maps provide environmental information is: because they allow us to see the environment of certain zones inside the map territory.
The evaluation of training activities helps to establish a worth include value, merit or excellence of something and target towards re-building endurance.
D) Applying an equal force at a location farther away from the rock.