TASK DEFINITION: You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
PROBLEM: Category: BRAND "O" 
Clue: You can read "Story O's" about this cookie on its website

SOLUTION: oreos

PROBLEM: Category: "S" WORDS 
Clue: Famous ones have included Telstar, Milstar & Navstar

SOLUTION: satellites

PROBLEM: Category: 4-LETTER WORDS 
Clue: Type of chart seen here

SOLUTION:
flow