Located mainly in zones of crustal activity because these zones are often lithospheric plate boundaries
Weathering is described as a passive agent of landform development because it is not directly affecting it.
The one that directly affect the landform are wind, water movement, and tectonic activities. Weathering only affect the formation of these factors.
There will be 6 left. Take 1000 divided by 7 you get 142 and some Numbers. Then 142 time 7 which gives you 994. That's how many you gave out. 1000 - 994 equals 6 that is left over.