Final answer:
Water plays a crucial role in regulating an organism's body temperature through thermoregulation. Organisms in hot climates shed excess body heat through perspiration or panting, while those in cold climates conserve heat with body structures such as fur or blubber.
Step-by-step explanation:
Water plays a crucial role in regulating an organism's body temperature through a process called thermoregulation. Organisms living in hot climates use methods like perspiration or panting to shed excess body heat, while those in cold climates have body structures like fur or blubber to conserve body heat. The high specific heat of water helps maintain homeostasis in the cells, allowing them to function properly.