Question

which structure in the lower respiratory tract is responsible for transporting air from the upper respiratory tract to the lungs? the bronchi the windpipe the alveoli

Explanation:

The windpipe (trachea) leads air from the upper respiratory tract to the lower respiratory tract. At the end of the trachea, it divides into two main bronchi which further branch and carry air into the lungs. Alveoli are the sites of gas - exchange, not for transporting air to the lungs.

Answer:

the windpipe