The answer is C. Thermal energy is transferred to her face by radiation, and thermal energy is transferred to the bottoms of her feet by conduction.
Conduction is a method of transferring heat by using the collision of molecules and free electrons (depending on the material). Heat is usually transferred by conduction if both objects are in contact with each other that way the molecules can collide and spread the kinetic energy thus raising their internal heat. So, since the feet and the sand are in contact, so the heat should be transferred by conduction. However, air is a very poor heat conductor, it cannot transfer heat efficiently, therefore, the first answer is not conduction.
Radiation is a method of transferring heat too but using electromagnetic waves. It works great even in the air, or even with vacuum space. The sun shining from outer space to earth through the vacuum space is also by radiation. So, the first answer is radiation.
The <em>color of light</em> that they absorb maximally by the two types such as <em>Pfr is a blue-green structure</em> that ingests far-<em>red light (730 nm)</em> and<em> Pr is a blue structure that retains red light (660 nm)</em>
<em>Pfr assimilates far-red light</em>, it is changed over to the <em>Pr structure</em>
Pfr can spontaneously revert to the Pr form structure in obscurity <em>dark over time = dark reversion Pfr</em> is additionally helpless to proteinases
<em>Pfr contains some red light, so in red light 15% Pr and
there is a parity of 85% Pfr.</em>
<em>The phytochrome (Pr)</em> is changed over to the organically dynamic structure red light with the <em>Pfr under illumination</em>
<em>Darkness and Far -red light convert</em> the particle back to the inactive form.
