The conversion of physical energy or stimuli into neural activity that can be processed by the central nervous system is adaptation conduction saturation transduction

Correct D). Transduction

The process of conversion of stimulus or physical energy from one form to another is called as transduction. It occurs in the nervous system, where an electrical signal is being converted into the chemical signal by the release of a chemical called as neurotransmitters.

For example - The ear receives the sound energy from the outside environment and transduces it into a neural message to the brain.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do