Which is a way for the body to conserve water during periods of heavy sweating?

It can filter less water out of the blood is the right answer.

On a normal day, the normal adult will use in approximately 2500 mL of aqueous liquids. Although the maximum of the absorption appears through the digestive system, roughly 230 mL per day is produced metabolically, in the last actions of aerobic inhalation. Moreover, the body leaves the same amount of water in different ways. However, during periods of heavy sweating, kidneys also can regulate blood volume through mechanisms that bring water out of the urine and filtrate.

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.