Closing (Exit Ticket): Please answer the writing prompt below. What is good about having an ally? What can be detrimental (to cause harm) about having an ally? __its makes you stronger in war to have allies.it can harm you if your allies betray you.

Location and climate have large effects on income levels and income growth through their effects on transport costs, disease burdens, and agricultural productivity, among other channels.

[not needed, but I'd like to add this~] Also, China's geography affects Asia's trading by blocking off certain parts of their trade. ... Also on certain parts the silk road would be through certain parts of the trade route. So on their way they could set up camp and grow their own crops. Europe would have a bit different route than the rest.