Answer:
a
Explanation:
you need a comma before "and"
I- what is happening here?
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.
I have managed to find so many articles scientists proven on your topic. However, you may contact the professional writers to have your article rewritten. You can find those at Prime Writing site. Eating a meal, any meal, reliably makes an animal, any animal, calmer and more lethargic. This means humans, too. Hunger makes animals alert and irritable, which explains why couples always fight about where to eat dinner. This emotional response encourages the animals to find food. "Poor mood and poor eating can become a vicious cycle in that if a person isn't eating properly, they can experience a drop in mood, and this drop in mood can make them not want to eat. If someone is constantly missing meals and constantly experiencing this stressor, the response could affect their emotional state on a more constant level.
