The word 'CATALYST' is a one word substitution for :

(A) A person that damages other's life
(B) A catapult engineer
(C) A person with super powers
(D) A person or thing that causes something to happen or move forward

Choose the correct answer from the options given below:

(D) Only

The correct answer is Option (4) → (D) Only

* A catalyst is a substance or agent that increases the rate of a chemical reaction without being consumed in the reaction itself. In a broader sense, it can also refer to something that speeds up or triggers an event or process.
* Option (A) describes a saboteur, not someone who accelerates a process.
* Option (B) refers specifically to an engineer who designs catapults, not a general term for something that speeds up a process.
* Option (C) describes someone with superhuman abilities, which is unrelated to the concept of a catalyst.