Why are vestigial structures not removed by natural selection?
WA
A. Only unimportant structures can be removed.
O
O
O
O
B. They are helpful to the organism.
C. Vestigial structures are genetic traits.
D. They do not harm the organism.

D

Explanation:

The natural selection only acts on traits that impact reproductive success. Nature chooses against just unsafe attributes.

The vestigial structures do not hurt the living being.

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explanation:

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.