Although food production is not necessarily __________ than food collection, it is generally __________ per unit of land.
A) easier; more productive
B) harder; more productive
C) easier; less productive
D) harder; less productive
Question 2
The United Nations predicts that __________ million people worldwide will lose their homes due to the effects of climate change.
a. 5
b. 50
c. 75
d. 575