2, 3, and 5 is the answer, good luck with your work :D
Bad gases in the air, like the smoke from cars. the trees filter that.
I think the answer is C. A mixture of fuel oil and compressed air is ignited.
hope this helps. :)
1. Mount Mayon- Albay
2. Taal Volcano - Batangas
3. Mount Kanlaon - Negros Oriental
4. Mount Bulusan - Sorsogon
5. Mount Makaturing- Lanao del Sur
6a. Musuan Volcano - Bukidnon
6b. Mount Ragang- Lanao del Sur
7a. Didicas Volcano - Cagayan
7b. Hibok-Hibok- Camiguin
8. Smith Volcano - Cagayan
9a. Babuyan Claro - Cagayan
9b. Mount Banahaw- Quezon
10a. Dequey- Batanes
10b. Mount Parker- Cotabato
I believe the answer is evaporation
hope it helped<span />