Answer:
B
Explanation:
the sound waves cause the eardrum to vibrate
The mechanism for evolution is natural selection
Osteoporosis is <span>a medical condition in which the bones become brittle and fragile from loss of tissue, typically as a result of hormonal changes. </span>Our bones store calcium in addition to providing support for our bodies.
<span>A population's growth is strongly influenced by the proportions of individuals in different age brackets, which in turn is influenced by economic development.</span>
Ossiculoplasty is the term to repair the outer ear.
