How does a hookworm attach to its host?

A hookworm attaches to its host primarily by using its specialized mouthparts, which include six prominent teeth. These teeth are adapted to scrape and cut into the intestinal lining of the host. This physical attachment not only allows the hookworm to stay securely anchored while feeding on the host's blood, but it also facilitates the process of nutrient absorption. The mechanism of attachment is crucial for the hookworm's survival and reproductive success, as it enables the parasite to effectively draw blood and nutrients from its host over time.

The other options, while mentioning different mechanisms, do not accurately describe how hookworms attach. Burrowing into tissues is not the primary method for hookworms, as they rely more on their teeth. Blood absorption is a consequence of their attachment rather than a method of attachment itself. Releasing toxins is not relevant to how hookworms attach; rather, it might pertain to other parasitic strategies that involve avoiding host immune systems. Therefore, the use of teeth is the most accurate and relevant description of how a hookworm attaches to its host.