It would be C, The internal structure of cells withing the body. Microscopes are designed to look at cells, as the magnification is at that level.
B. Effective against all pathogens
Bat wings are made of a rubbery substance while eagles wings are covered in feathers
Answer: Vestigial structures
Explanation: Vestigial structures are an anatomical feature or behavior that no longer seem to have any purpose in the present form of an organism in the given species. Usually, they are often parts of the body that used to preform important functions in earlier forms of the organism.
