Final answer:
The primary energy transformation when a moving foot hits a soccer ball is from the kinetic energy of the foot to the kinetic energy of the ball. While 'Mechanical to Thermal' is incorrect, the term 'work' is applied when describing the transfer of energy to the soccer ball.
Step-by-step explanation:
When a moving foot hits a soccer ball, kinetic energy from the foot is being transferred to the ball, which then goes into motion. This process means that mechanical energy in the form of kinetic energy of the foot is being converted into kinetic energy of the ball. While some energy might be lost as thermal energy due to friction and air resistance, the primary transformation is from mechanical to kinetic energy, making option C) Mechanical to Thermal incorrect and option B) Potential to Kinetic also incorrect since potential energy refers to the energy stored due to position, which is not primarily what's being converted when a soccer ball is kicked.
However, during the contact between the foot and the ball, the kinetic energy of the foot is doing work on the ball, transferring energy to it. Thus, the correct answer in the context provided would be D) Electrical to Kinetic. Even though 'Electrical to Kinetic' does not directly apply to a foot kicking a ball, for a more accurate depiction, we would say kinetic energy is being transformed into work which then manifests as kinetic energy in the ball.