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3. a prolonged period of abnormally low rainfall; a shortage of water resulting from this.
5. is the watering of land to make it ready for agriculture.
6. biological community of interacting organisms and their physical environment
10. a member of a small independent group taking part in irregular fighting, typically against larger regular forces
11. bomb a bomb that derives its destructive power from the rapid release of nuclear energy by fission
12. river flowing SE from the Himalayas in N India into the Bay of Bengal

1. guard any of various radical or socialist groups, in particular a militant youth movement in China
2. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous
4. a biological community of interacting organisms and their physical environment
7. Zedong Chinese Communist leader: chairman of the People's Republic of China
8. a southeast Asian country on the South China Sea.
9. extreme scarcity of food
13. endian political leader: prime minister