Answer:
improving air quality :
1. keep it clean. a clean house may be a healthier house , because good indoor hygiene can greatly cut down on dust and animal dander
2. keep the greenery outdoors
3. change your filters
4. invest in an air purifier
5. let fresh air in
Answer:
Your answer is correct, it's D! Hope this helps~~~ ^^ :333 <3333
Answer: Rice was not planted by them.