Answer:
The spoon inside the soup bowl heats up due to heat conduction.
Conduction is one of the types of thermal transfer that allows heat to be transmitted from a hot object to a cold one. (from soup bowl to spoon)
In conduction there is no matter transport. What is transferred is heat, which is a form of energy, corresponding to the increase in the kinetic energy of the atom.
Thermal conduction involves the propagation of heat by contact.