<span> air pressure decreases, so does air density.</span>
I think that the best answer is first one:
a) Trace the path that the sound waves travel as they enter the ear and proceed to the receptor cells for hearing, making sure to explain the process of transduction.
Explanation:
The interior of the lungs is made up of spongy tissues containing many capillaries and around 30 million tiny sacs known as alveoli.
The alveoli are cup-shaped structures found at the end of the terminal bronchioles and surrounded by capillaries.
I couldn't find a diagram but was able to find the terms erosion and deposition and using these terms, first there is erosion or the wearing away away of the rock in place be it pre-existing igneous, sedimentary or metamorphic rock, then transportation often to a delta or flood-plain or basin, and then deposition of sand silt and clay and then consolidation into rock and diagenesis which involves compaction and the removal of water.