When towing, what is the main reason for using a chain bridle on a wire hawser?

Correct Answer: Option B — It gives a spring effect to cushion the shock.

A chain bridle provides a catenary effect due to the weight of the chain. This weight acts as a shock absorber, cushioning the sudden surges and dynamic loads transmitted through the towing hawser, thereby protecting the towing gear and the vessel's bitts from excessive stress during heavy weather.