Question

all feathers have a bone - like shaft, called a rachis, and barbs, the hair - like parts attached to the rachis. you may have noticed, however, that not all of them look the same. thats because different feathers serve different purposes. semiplume and down feathers help keep birds warm, for example. they grow close to a birds body and have loose barbs that trap warm air. you can tell them apart because semiplumes have a longer, well - developed rachis, whereas down feathers have almost no rachis. wing and tail feathers, on the other hand, help birds fly. they are longer than semiplume and down feathers, and their barbs are more rigid and more tightly packed together. in wing feathers, the barbs are longer on one side of the rachis than the other. which term matches the picture? image of a feather wing feathers tail feathers semiplume feathers down feathers

Explanation:

To solve this, we analyze the feather descriptions:

• Wing and tail feathers help flying, have rigid, tightly packed barbs, and wing feathers have barbs longer on one side of the rachis.
• Semiplume feathers have a longer, well - developed rachis and loose barbs.
• Down feathers have almost no rachis and loose barbs to trap warm air.

Looking at the picture, the feather has almost no visible rachis and loose barbs, which matches the description of down feathers.

Answer:

down feathers