Mildred takes a pound of frozen hamburger meat out of the freezer and puts it into the refrigerator. Which of the following best describes the direction of heat flow?.

The heat will flow into the frozen hamburger. By gaining heat, it will thaw. Remember heat flows from high to low. since the temperature of the refrigerator is lower than the freezer when you put in the burger there, it is colder inside the burger than outside, so heat will go in.