Your answer is radiometric dating
Answer:
They prefer to use children in their businesses because they do not need to be paid, they can do unlimited work without getting any money. They cannot decline the work that is given to them.
Answer:
advantage
* The scale is essential consant;
*Some objects not visiable on vertical photos may be seen in obiliqe.
disadvantage
*it lacks marginal .
*it requires more training to interpert than a map.