Answer:
cultures use the environment to their advantage as well as the available livestock, for instance, the incans built long mountainous roads that would make a difficult trek for humans carrying goods, therefore they used llamas, a native animal to the province to carry goods for merchants. This technique was hardly used in other civilizations.
Explanation:
The forces are strongest at or near the C) Magnetic Poles.
Because the shadows are being cast at the same time of day, they have the same proportions. (4*21)/6=the length of the shadow of the tree =14ft