What is a potential consequence of anchoring a boat from the stern?

Anchoring a boat from the stern can lead to swamping for several reasons. When a boat is anchored from the back rather than the front, it can create an unstable position. The bow, or front of the boat, is designed to ride the waves and maintain the boat's stability. If the stern is anchored, the boat may pivot in such a way that allows water to come over the stern. This is especially true in rough water or windy conditions, where waves may push water towards the back of the boat. Thus, anchoring from the stern increases the risk of water entering the boat, leading to swamping, which could potentially endanger the safety of those onboard.

In contrast, some of the other options might suggest possible outcomes, but they do not accurately reflect the primary risks associated with this anchoring method. While a boat may drift if not anchored properly, that is less about the specific issue of stern anchoring and more about the anchoring method in general. Stability can be compromised but would not be described as a direct benefit, and increasing the speed of the boat does not relate to the act of anchoring. Thus, the primary and most relevant consequence of stern anchoring is the risk of swamping.