Foreigners and immigrants.
Answer:
The unconditional response is to strengthen the immune system as a result of ingesting the drug placed in the water.
Explanation:
Unconditional response is the name given to a response, given by the organism, which occurs as an automatic result of an unconditioned stimulus. An unconditioned stimulus, in turn, which is a stimulus that causes responses in the body.
In this case, we can see that the unconditioned stimulus is water sweetened with a drug that strengthens the mice's immune system. In this case, if the rats consume this water, their immune system is automatically strengthened, and this strengthening is the unconditional response of the experiment.
Basically, figure out how the 'path' compares to life. Life can be easy (very level) and beautiful (very serene) but it can also be difficult and full of hardship (winding and full of undergrowth). Life can go in different directions and present one with many choices (fork into several directions) and life or things in life can help you realize where you want to go, and what you want to do (landmarks and signs). And lastly, life has an end (as paths do).
