Conduction involves the transfer of electric charge or blank

The correct answer is "thermal energy".

Explanation:

Conduction: Heat flows from hotter body to colder body provided they are placed in direct contact with each other until the temperatures on both bodies become equal.  In conduction, there is not actual movement of matter.

Thermal energy: It is the energy that comes from the heat.

or

Conduction is the process in which there is a transfer of the electrons between the charged object to the another object provided the objects are in direct contact with each other. The electrons are transferred from the object having more negative charge to the object that has more positive charge. There is a transfer of the electrons until the charges on both the objects become equal.

Therefore, the conduction involves the transfer of the electric charge or thermal energy.

i think it would be 80 km/h because 30 + 50 = 80 (sorry if this not the right answer i'm trying my best)