All of the following factors can cause famines except A
the failure of food production to keep pace with population growth
B
distribution problems caused by political turmoil
C
new, higher-yield crops
D
crop failure brought on by sustained drought

C   new, higher-yield crops.

Explanation:

I'm certain that this is what they want you to say, but even this answer has caused famines. It comes down to whether the people will socially accept the newer high yield crop. Some people would rather starve themselves than consume an 'unacceptable' food.

we can see how the government has failed them.

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.