Explain Futures Contracts Include:

• Why is actual delivery rare? (For example, you change the long position to a short position on a futures contract ( the position closes ). )
• Daily Resettlement (if the price decreases, the long pays the short).
• What does it mean that one contract is for a fixed amount of the underlying asset.
• Currency Future Quotes- Daily change (Effect on long position and short position)/ Number of open markets