Diamonds are minerals-pieces of rocky earth materials. Why are they so expensive? Explain using the concept of supply and demand.

Josh is teaching michael how to be an effective speaker. what two general hints for effective informative speaking should josh share?

Small plane just crashed in your neighborhood. you take a fire extinguisher and blankets to the scene, then stand back and silently gather with others on the scene when you realize there is nothing you can do to . in this situation, gathering quietly with others out of reverence and respect is an example of coping.

Why did separate government develop in ancient greece?