Final answer:
EtherChannel is made by combining multiple physical links that are seen as one link between two switches.
Step-by-step explanation:
Option D) It is made by combining multiple physical links that are seen as one link between two switches is the correct statement that describes a characteristic of EtherChannel. EtherChannel is a technology used in networking to combine multiple physical links into a single logical link. This provides increased bandwidth and redundancy by load balancing traffic across the bundled links.