The absence of living sperm in semen, which is a sign of infertility, is known as:

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. 

the answer would be 3

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.