here is your ans.........
At the mouth of a river, the change in flow condition can cause the river to drop any sediment it is carrying.
The term is called azoospermia. This condition
can be treated depeding on its origin. It is commonly caused by infections in
the male reproductive regions or sexually-transmitted diseases. If azoospermia
is caused by genetics, only few to zero treatments are available.
I do believe the second answer is the right one
Answer: option D) sound being created in music instruments
Explanation:
Resonance occurs when an object close in contact to a vibrating body begins to vibrate at the same frequency of the vibrating body.
Usually each object has a THRESHOLD frequency which must be equaled or exceeded before it is set into vibration.
Therefore, this is the PRINCIPLE behind MELODY i.e how sound is being created in music instruments.
