1) Body language can provide non-verbal cues that communicate different messages than what is said verbally. 2) Basic gestures like smiling and nodding are innate but children exaggerate them, making their body language easier to read. Adults refine these gestures. 3) Palms facing up communicate submission while palms facing down indicate authority or a desire to stop something. Handshakes also convey dominance, submission, or equality depending on palm orientation.