The answer for this qn is D.
Answer:The distance decay effect states that the interaction between two locales declines as the distance between them increases. Once the distance is outside of the two locales activity space their interactions begin to decrease.
Explanation: btw u look like my friend tori
A cataract is an area of a river where the elevation of the streambed changes too quickly or has to many boulders meaning people couldn't use part of the river as transportation.
This was a good thing because the cataracts effectively served as barriers so they could control travel. This meant that the Pharos found it impossible to control the land south of the first cataract. This ending up becoming the southern border of Ancient Egypt.
Hope this helped ☺️
Answer:
The biosphere is made up of the parts of Earth where life exists.
