Obviously solids since they’re at the solid stage
Adaptation is a phenomenon that is about adjusting certain features to environmental conditions. Ie. birds are adapted to flight as they possess wings, very efficient lungs etc. or tropical plants are adapted to high temperature and humidity as they modified their photosynthesis process. but if some creature is adapted to the specific habitat or conditions, it is hard for it to manage in another habitat/different conditions. ie. birds are fast in the air but on the ground they are quite weak and prone to predators' attacks.
<span>The correct answer is the source of segregation.
Source of segregation of a complex acoustic signal into separate auditory events. Some sounds which come from different sources, they can be localized by the human brain to where the sound is coming from.
Based on loud of the sound it will be easy for a person to detect where the sound is coming from.</span>