Even though Earth's South Pole receives
no sunlight during winter in the Southern
Hemisphere, the area is not totally without heat.
Explain this phenomenon,

a Energy is reflected to that area,
b. The dark region has stored energy from when
it was in sunlight,
c. Increased levels of carbon dioxide make the
area warmer,
d. Energy is carried from one part of Earth to
another by convection currents,

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

b. lithosphere, asthenosphere, mesosphere   is the answer most likely