Conduction is a process in which transfer of heat takes place between objects by direct contact.
Correct option is A.
"Heat energy is transferred from land to air by direct contact" is describes the process of conduction.
One of the three basic ways heat energy flows from one location to another is through conduction. Radiation and convention are the other two ways heat is transferred. Heat energy is transferred through collisions between surrounding atoms or molecules in the process known as conduction.
Conduction is easier in solids and liquids than in gases because the particles are closer together. Where there is a significant temperature differential between the substances in contact, the rate of energy transfer by conduction is increased.
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