Answer:
a culture region can be many countries
Answer:
1. x-rays
2. wavelength
3. (not sure thought it was wave frequency)
4. longitudinal
Some countries didn't have stuff that other countries had, so they used to trade to grow their community and for their people to survive. Trading was important to have all their goods they wanted.
This is a correct way to ask for feedback. You need feedback if you are to grow as a worker and do things better. If you just plainly ask it you may seem rude or arrogant or anything similar, so it is a good idea to ask whether you're doing something good and get feedback so that you may improve in the future.
