3. Which of the following environment do caterpillars live and have their life cycle? *
A. polluted rivers
B. burning forest
C. clean garden
D. dumpsite

4. Frogs live in both land and water. What will happen if both land and water are polluted? *
A. Frogs can easily get their own food.
B. Frogs may be increased in number.
C. Frogs may decrease in number.
D. Frogs may be developed well.