According to the Elizabethan definition of the term, the first one ("Lightning strikes and kills a young man") is a tragedy.
<u>The Elizabethan definition of "tragedy" underlines the idea that a tragedy always ends in disaster, which generally brings about the death of an important character</u>. Moreover, there is always a fatal flaw that leads this character to his/her tragic end. In spite of this flaw, the audience generally feels empathy for the victim. All these features can be found in most Shakespeare's works, such as <em>Macbeth</em> and<em> Hamlet</em>.
<u>The first option is a tragedy because it concludes with a man's death, which is the appropriate outcome of a tragedy according to the Elizabethan definition of the term.</u> <u>Moreover, his death is caused by a fatal occurrence (a lightning strike)</u>.