Some small animals and bacteria are literally build for any condition
Answer is the first option Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.
I don't know why but I find your questions a bit too easy..
1.) - plasma
2.) - bone marrow.
3.) - cells
4.) hemoglobin
5.) capillary
6.) ventricle
7.) pulse
