Because yuri was curious about human behavior, he enrolled in an introductory psychology course. george registered because he heard it was an easy course that would boost his grade-point average. in this instance, yuri's behavior was a reflection of whereas george's behavior was a reflection of

Yuri's behavior was a reflection of intrinsic motivation, whereas George's behavior was a reflection of extrinsic motivation.

Explanation:

With intrinsic motivation, we choose to do something because of the personal rewards this action might bring us, the behavior itself is the reward. Yuri is an example of this type of motivation since he chose to take the psychology course due to his interest in the topic, the learning process will be the reward.

Extrinsic motivation refers to doing something because we can earn a reward from it, the main goal is to get something in return. George is an example of this type of motivation since he chose the psychology course to get a good grade and then boost his grade-point average. For him, the course is not interesting itself, but the grade he can get from it.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.