Studies on pigs’ social behavior funded by McDonald’s at Purdue University, for example, have found that they crave affection and are easily depressed if isolated or denied playtime with each other. The lack of mental and physical stimuli can result in deterioration of health. The first sentence uses words associated with human behavior such as “affection” and “playtime,” while the second sentence uses formal scientific words such as “stimuli” and “deterioration.” What is the effect of this movement from emotional to scientific?