Question

the old man broke – when he heard the news of the accident​

Answer 1

The correct word to be used in the blank is 'down'.

The old man broke down when he heard the news of the accident​.

* The phrase 'broke down'( phrasal verb) means to succumb to some kind of emotional stress of unfortunate happening.

* The other meanings of this phrase are:

1. When a vehicle or machine stops functioning

2. To divide into small pieces

3. Stopping of any discussion or system on account of disagreement.