Question

their quarrel became strong at the end what was the reason behind it​

Answer 1

Explanation:

Answers: One thing led to another means a series of things were happening, one thing leading to another.

The start of it was slight means beginning was with small, petty things, very ignorable things but

the end of it was strong means finally it became a big issue.

The afternoon turned black means something went wrong and unpleasant in the afternoon.

Thumped me on the back means hit me heavily on the back.