Answer:
taking a closer look at the natural world
Explanation:
using prior knowledge is basic common sense. so no.
requiring evidence and thinking logically is following a rule. so no.
following strict rules when using human test subjects. right off the bat, "strict rules" is an immediate no.
taking a closer look at the natural world. that's creative because they look for the answer around them.
The Oxygen enters the trachea, entering into the lungs, where it is absorbed into the bronchi, Carrying it through the blood.
(A), because there are bacteria your body don’t attack because they are helpful.
