Behavior or Behavioral Traits (Depending on the question)
stimulus
An Osmoconformer
Homeostasis
survvial of the fittest
what do you call the tendency of an organism to maintain a stable environment
Darwin called the ability of an organism to survive and reproduce in its environment fitness.
An automatic response to an environment is known as a reflex. This is a quick, involuntary reaction to a stimulus that helps protect the body from harm. Reflexes are controlled by the spinal cord and do not require conscious thought.
We call such past organism "extinct".
Paul received the "Macedonian call" while on his second missionary journey. His first trip to Europe was in response to this call. You can read about when Paul started his second missionary journey in Acts 15:36-41, and when Paul received the "Macedonian call" in Acts 16:6-11, and read about the first convert in Europe in Acts 16:14-15.
carnivor
The Coercive Acts
No, you can call them an organism.