The gobi desert spans across these two countries:

a.) china and mongolia
b.) mongolia and russia
c.) china and north korea
d.) north korea and south korea

The declining axolotl population in mexico city is an example of in overcrowded cities. a. the surpassing of support capacity b. changes to natural environments and native species c. the lack of safe homes and tenured spaces d. the effects of a growing urban heat island