You go to a lunch meeting with Hannah and immediately notice that she is missing an earring, that she isn't wearing her usual professional make-up, and that she's breathing hard when she sits down. What part of the perception process have you used?

selection              

Explanation:

Selective perception: In psychology, the term "selective perception" is one of the different types of perception and is described as a process through which a person perceives whatever he or she wants to related to the media messages whereas ignores opposing viewpoints. However, selective perception is referred to as a broad term to identify different behaviors of persons that he or she exhibits to watch out things which are based on a specific frame of reference.

In the question above, the given statement represents the selection part of the perception process.