Can y’all answer these questions pls?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Selma made a diagram to compare convection and radiation. which label belongs in the area marked x? must involve temperature differences between substances or objects only occurs when molecules are in direct contact involves the movement of fluids based on density differences can occur where there is little or no matter

What are the dimensions of the cross section that passes through the points a, f, g, and d?