Sound production is also known as phonation, and involves the process of vibrations generated by a combination of respiration, the vocal organ and the vocal tract. The physical structures that birds use are highly similar to that of humans, and the sounds that is generated travels through respired air.
I think the correct answer from the choices listed above is option A. Glacial episodes are an example of a positive feedback. Each glacial period in the Earth is subjected to a positive feedback which makes each period more severe. Hope this answers the question.
Answer:
We breath in then out through our lungs
Explanation:
This dome-like shape forms due to the water molecules cohesive properties, or their tendency to stick to one another. Cohesion refers to the attraction of molecules for other molecules of the same kind, and water molecules have strong cohesive forces thanks to ability to form hydrogen bonds with one another
