There is no picture of the bird.
The most logical answer is D, because, we can infer that they belong to the same genus in taxonomy, but they are different species
Adding large amounts of salt into your body causes your cells to become hypoglycemic (net movement into the cell outweighs net movement out) and causes the cells to boost. Via negative feedback loops, your body feels thirsty to dilute the salt in your cells to return them back to normal concentrations.
I believe it is a microscope