Biology

The correct answer is A.Transport.

Explanation:

Hemoglobin is a transport protein because its main function is to bind to oxygen in the lungs and carry it through the bloodstream to various tissues and organs throughout the body, where it is then released and used for cellular processes.

Here’s a breakdown of the other types of proteins:

B.Signaling proteins are involved in communication between cells and regulation of biological processes. Examples include hormones like in...