If some living things do not reproduce this could be considered a defect or a genetic mutation in those people. If we take humans for example, if most humans reproduce and some don't because they cannot (if a guy cannot produce sperm) this doesn't mean that he isn't alive, it just means he was born with a genetic mutation which doesn't allow him to produce sperm needed for reproducing.
Alcholicism kills brain cells and two suggestics would be to go to a rehab or speak to a therapist
The defendant is the person or organization with which an action is being brought against. For example: a man rear-ends a woman in a car accident. The woman can file a lawsuit to recover (get) money from the man for her medical injuries and damage to her car. The woman is the plaintiff suing the man who is the defendant.