Virus : Fever ::____________:______________

Germ : Disease

The answer is Germ : Disease.

The analogy is cause : effect. A virus is the cause of fever, and a germ is the cause of disease. The other options do not make sense in the context of the analogy.

• Explosion is the cause of debris and not vice versa.
• Earthquake is the cause of destruction, but not tranquility.
• Carelessness is the cause of accidents, but not shrewdness.