What is the common feeding habit of chiggers as larvae?

Chigger larvae have a very specific feeding behavior that distinguishes them from many other pests. As larvae, they feed on the skin of their hosts, which is primarily done while they are attached to the skin's surface. They use their specialized mouthparts to pierce the skin and ingest the tissue fluids, leading to localized irritation and often intense itching for the host.

This feeding behavior is crucial for the chiggers because it allows them to obtain the necessary nutrients required for their growth and development into nymphs and eventually adults. Chiggers specifically target mammals, including humans, making the interaction noticeable, as their bites can cause discomfort and allergic reactions.

The other options describe feeding behaviors associated with different organisms or life stages. For instance, feeding on decaying wood is typical for decomposers or wood-boring insects, while feeding on blood is more characteristic of mosquitoes or ticks, and feeding on plant sap is seen in aphids or certain types of beetles. Therefore, the choice of skin feeding accurately reflects the chigger larvae's ecological niche and feeding strategy.