I believe the correct answer is D. complexity of character.
A is incorrect because realist writers didn't believe in destiny; B is incorrect because not all realist novels have social trials; C is incorrect for the same reason - not all realist novels have tragic events. Therefore I would pick D, because complex characters reflect reality and what exists in our actual lives.
Conversation between characters in a story is called dialogue.
Answer: abuse, a waste of time, animal endangerment, it affects the earth
Explanation: Animal experiments prolong the suffering of humans waiting for effective cures because the results mislead experimenters and squander precious money, time, and other resources that could be spent on human-relevant research. Animal experiments are so worthless that up to half of them are never even published
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