Final answer:
These signs are examples of nonverbal communication cues used in everyday conversation to convey specific meanings or emotions, such as surprise or disbelief.
Step-by-step explanation:
The signs mentioned in the question are examples of nonverbal communication cues. They are often used in spoken language to convey specific meanings or emotions. For example, when someone raises their eyebrows and tilts their head slightly while saying 'What?' it indicates surprise or disbelief.
These signs are not specific to any particular subject or grade level. They are part of everyday communication and can be used in various contexts, including personal conversations, interviews, or speeches.
It's important to note that nonverbal communication cues can vary across different cultures and contexts. So, it's always a good idea to be mindful of cultural differences when interpreting these signs.