Simple multiplication:

And

So do you now see how they are the same? :)
Explanation:
Nonverbal communication is the method of communicating with others using actions rather than words. This can include communication using hand gestures, eye contact, body language, appearance, touch and tone of voice.
Answer:
C.superlative
B. comparative
Explanation:
The sentence, "Our teacher is the tallest of all", is in the superlative form as it compares between three items.
The sentence, "The new poster is larger than her poster" is in comparative form as it compares between two items.