Answer:
3 answer is Red blood cells are red because of hemoglobin in our body which makes our blood red
Explanation:
I hope it helps you
You can carry out a test ,
1- take a sample of the air in a test tube
2-add limewater to the test tube
3- result : if it turns milky/cloudy it has microorganisms
4- reason: because every microorganism respires , and so it produces Carbon dioxide .
and limewater is the test to show the presence of Carbon dioxide .
Probably smaller bodies of water, as less water will heat up and evaporate faster.
I believe its A. I may be wrong.
