Answer:
Which layer of the atmosphere has the highest density of gas molecules? Exosphere.
Step-by-step explanation:
The density of the exosphere is just a fraction of at sea level. And its mass is only 0.002% of the total mass of the atmosphere because gas molecules are far apart in the exosphere. Sound waves can't travel through this layer of the atmosphere. If your body interacted with the exosphere, it would be freezing cold