Which of the following concept of convection is correct? * A. Convection occurs when heat is transferred through a gas or liquid by the hotter material moving into a cooler area. B. Convection occurs when cold is transferred through a gas or liquid by the hotter material moving into a cooler area. C. Convection occurs when heat is transferred through a gas or liquid by the cooler material moving into a hotter area. D.Convection occurs when heat is transferred through a gas or liquid by the hot material moving into a hotter area.
