It is true that photojournalists are allowed to edit their photos using editing softwares in order to credibly and vividly tell a story. They may or may not add or delete some parts of their photos.
Also, it is true that you do not have to assess much of the situation before photographing.
They could only request troops and soldiers because they didnt have an army, hope that helped :))
Western part of africa?
Is there and answer choices?
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).