alleryStart learning →Why do rooms need ventilation?
ATo make it darker
BTo keep floor wet
CTo keep cats out
DTo let fresh air in
Answer & Solution
Correct answer: D. To let fresh air in
Ventilation brings in fresh air that we breathe and lets out stuffy air.
Keep practising Human Needs
Browse all Human Needs questions for Olympiad (Class 4), or explore more Science topics.
Related questions
Clean toilets and clean drains are part of which basic need?Which clothes suit a hot desert day best?A healthy diet should have only a little of which foods?Which food helps you get fibre?To keep a healthy weight, the energy you eat should be about equal to what?What is done to sea water to make it fit to drink?Rivers, streams and glaciers are what kind of water source?A town tells people to boil water before use. Why?