It is very important to take care of our environment. A big part of this is reducing pollution When we don't waste things and use products that are good for the environment, we can make our planet clea...

Q.18: C. Which helps make less pollution
- This option provides a smooth transition and coherence between the previous sentence and the example given, indicating how certain actions contribute to reducing pollution.

Q.19: B. Saving natural resources
- This option concisely states the importance of saving natural resources without unnecessary words.

Q.20: C. to fight bad weather changes
- This option correctly structures the sentence to indicate the purpose or intention behind protecting animals and plants.

Q.21: C. it becomes possible to save these important animals
- This option effectively communicates the positive outcome of taking care of places where animals live and helping to save them.

Q. 22: C. actions
- This option provides a concise and appropriate subject for the sentence, indicating that teaching people about protecting the environment is essential.

Question 23: B. helping to make the environment healthier
- This option maintains parallelism with the previous clauses and effectively communicates the idea of contributing to making the environment healthier through collective effort.