Its the last one because the question that they had asked is really in the story the second line at the top.
here are ur two suggestions
1.)One of the main causes of acid rain is a sudden drop in the pH levels of water and that happens because of absorption of harmful gases by the atmosphere. The best way to restore the pH balance of water is to limit the use of items which run on gasoline. Instead use products which run on electricity; as they are much easier to run and maintain.
2.)Another great thing that all people can do is to learn how to drive cars efficiently. While driving on roads there are a lot of things that can be done to reduce smoke emission from cars. Drivers should ease up as soon as the yellow light rather than slamming on the brakes and they shouldn't rush away as soon as the lights turn green. These small practices help reduce the wastage of gasoline and helps people save a lot of money on fuel.
i hope this helps!!! have a great day!!!
Answer:
ExplaMessi got …. to scoringnation:
For me I sketch lines while drawing to create the outline
