Winds from the Gobi bring
a. dust storms to parts of China and Mongolia.
b. rain to China's agricultural areas.
c. drifts of volcanic ash across East Asia.
d. acid rain to China's coastal cities.

Number the steps from when a stimulus is received to when the body reacts

A, as , to a , as a , is as a. b. c. d.

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.