The rock cycle is a basic concept in geology that describes the time-consuming transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. Each of the types of rocks is altered or destroyed when it is forced out of its equilibrium conditions.
I didnt understand ur question if u thought it was D or if that was a smile face why u would smile but I'm going to say B because the bars on the grill are touching the food and transfering heat