Q. A good communicator begins his/her presentation with a/an

Explanation:

Effective presentations start by building rapport, lowering audience anxiety, and capturing attention. An ice-breaker—such as a brief anecdote, light humor, a simple poll, or a quick relatable question—warms up the room and creates connection.

In contrast: (1) a non-sequitur is illogical and distracts, (3) a complex question can overwhelm or alienate the audience before context is set, and (4) a repetitive phrase risks monotony and disengagement. Therefore, the best opening is an ice-breaker.