Answer:
The cartilage that coats your bones helps with movement. If it's torn or worn, it can leave the rough bone surfaces exposed, resulting in friction in the joint.
Scarcity is like a low supply or lack of the said object and it's relationship with economics is the more scarce the item is will make it cost more.
Hi,
Je devais faire mes devoirs hier, mais je ne les ais pas faits.
