Question

An insulated lunch bag keeps food warm by

Answer 1

slowing the transfer of thermal energy from the food inside the bag to the air outside the bag

Answer 2

The answers to the question above are "D) slowing the transfer of thermal energy from the food inside the bag to the air outside the bag" which is how an insulated food bag keeps the food warm. The "insulate" word means "to protect something from losing heat". Thus, the function of the insulated food bag is related to its name.