Answer: Option D
Professional : relating to or belonging to a profession.
Parasite : an organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
Tent : cover with or as if with a tent.
Champion : a person who has surpassed all rivals in a sporting contest or other competition.
Kemp : an athlete, especially a champion.
Synonym of Kemp is Champion