Answer:
I would say A, Gravity can help erosion to occur.
Explanation:
While B,C,D do help cause erosion, that isn't the only way erosion can occur.
It is a cycle because if your mum or dad was poor then you would be poor unless you were able to get a job too make enough money to be in middle or 1st class
The electrons will move more rapidly resulting in a higher pressure even at a consistent volume
Equal is the answer
Hope this helps
