Question

Nodding, smiling, and saying, "uh, huh" are all forms of response known as

Answer 1

They are all forms of supportive responses.

Supportive responses are a type of listening responses that are intended to express reassurance, understanding and/or reduce anxiety.
After the speaker has finished talking you indicate with this time of expressions how you evaluated the message.

Answer 2

Answer:

are forms of i don't understand what's going on but i don't want to ask them what they said again so you go along with it

Explanation: