Question

fixed pattern of behavior in response to a certain stimuli, like migration and courtship, is:
trial and error
conditioned response
learned behavior
instinct

Explanation:

To solve this, we analyze each option:

• "Trial and error" is a learning method, not a fixed response to stimuli.
• "Conditioned response" is learned (e.g., Pavlov's dogs), not innate/fixed.
• "Learned behavior" is acquired, not fixed/innate.
• "Instinct" is a fixed, innate behavioral pattern triggered by stimuli (e.g., migration, courtship).

Answer:

D. Instinct