What name is given to the process by which a dissolved substance moves across a boundary without energy being required?

Diffusion

According to 2 sources

Diffusion is one form of what scientists call passive transport, meaning movement that occurs without any additional energy being required.

Explanation:

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.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.