1. 10days
2. 15days
3. 20days
4. 8days
15days
1. 70%
2. 84%
3. 90%
4. 95%
84\%
1. 60%
2. 77%
3. 83%
4. 90%
60\%
1. 0.01%
2. 0.02%
3. 0.001%
4. 0.005%
0.001\%
1. 0.1%
2. 0.3%
3. 0.5%
4. 0.75%
0.5\%
1. 0.75%
2. 1.97%
3. 2.1%
4. 2.5%
1.97\%
1. soil fertility
2. rainfall
3. biological species
4. widlife
biological species
1. fossil fuels
2. agriculture
3. tides
4. rainfall
agriculture
1. wind power
2. soil fertility
3. wildlife
4. None of these
wind power
1. water
2. metal
3. fossil fuel
4. All of these
water