<span>A. Take a close look to determine why it has been underlined </span>
Answer: Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment. Animals exchange heat with their environment through radiation, conduction—sometimes aided by convection—and evaporation.
Hey ! Without the environment, there would be no democracy and no peace. They all intertwine to form a society of peaceful people. With peace, an environment could be much cleaner. Have a great day...