Nonverbal communication refers to the process of sending and receiving a message without the use of written or spoken words. There are different types of nonverbal communication like facial expressions, eye contact, body movements, touch and space. So, according to this, from the options given the one that accurately depicts nonverbal communication is communication using gesture.
A. Opportunity cost is “the loss of potential gain from other alternatives when one alternative is chosen.” What you are losing is the chance for more money.