The effect of the extinction on the ecological equilibrium

It is very important to know that the Ecosystem is everything that related to the living and non-living things existing somewhere , for example the forest , the desert and the sea . In any ecosystem .

The types of the sound waves

 

You should know that there are two types of the sound waves which are the audible sounds and the non - audible sounds .

 

The audible sounds such as the sonic waves , And the non - audible sounds such as the ultrasonic waves and the infrasonic waves .