Ella's nod as the receiver would be considered feedback, since it was given in response to Julia's hand signal, as further explained below.
First, the sender sends a message to someone. The person who receives the message - or the receiver - can, in turn, send another message back to the sender. This second message, which is given as a response, is called feedback in the process of communication.
A feedback does not have to be necessarily verbal. As seen in the example provided in the question, both Ella and Julia communicated with gestures, that is, with nonverbal language.
Julia is the sender, with her hand signal being "sent" first. Ella, the receiver, provides a response to that signal, a nod, which is the feedback.
Learn more about feedback here:
https://brainly.com/question/25653772
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