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horsena [70]
3 years ago
14

(20 points!) (brainliest) please help <3

Biology
1 answer:
Ede4ka [16]3 years ago
3 0

Answer:

part A is the answer

Explanation:

The tympanic cavity is an air chamber; it contains a chain of movable bones which transmit the vibrations of the tympanic membrane across the cavity to the middle ear.

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