The three paragraphs that follow all discuss the same topic. Only one of them shows unity. First read the paragraphs. Then answer these questions. Paragraph 1 Effects of Color Colors create biological reactions in our bodies. These reactions, in turn, can change our behavior. In one study, prisoners were put in a pink room, and they underwent a drastic and measurable decrease in muscle strength and hostility within 2.7 seconds. In another study, athletes needing short bursts of energy were exposed to red light. Their muscle strength increased by 13.5 percent, and electrical activity in their arm muscles increased by 5.8 percent. Athletes needing more endurance for longer performances responded best when exposed to blue light. Other studies have shown that the color green is calming. Green was a sacred color to the Egyptians, representing the hope and joy of spring. It is also a sacred color to Moslems. Many mosques and religious temples throughout the world use green (the color of renewal and growth) and blue (the color of heaven) to balance heavenly peace with spiritual growth. To sum up, color influences us in many ways. Paragraph 2 Effects of Color Colors create biological reactions in our bodies. These reactions, in turn, can change our behavior. In one study, prisoners were put in a pink room, and they underwent a drastic and measurable decrease in muscle strength and hostility within 2.7 seconds. In another study, athletes needing short bursts of energy were exposed to red light. Their muscle strength increased by 13.5 percent, and electrical activity in their arm muscles increased by 5.8 percent. Athletes needing more endurance for longer performances responded best when exposed to blue light. Other studies have shown that the color green is calming. After London's Blackfriars Bridge was painted green, the number of suicides decreased by 34 percent. These and other studies clearly demonstrate that color affects not only our moods but our behavior as well. Paragraph 3 Effects of Color Colors create biological reactions in our bodies. These reactions, in turn, can change our behavior. In one study, athletes needing short bursts of energy were exposed to red light. Their muscle strength increased by 13.5 percent, and electrical activity in their arm muscles increased by 5.8 percent. Athletes needing more endurance for longer performances responded best when exposed to blue light. Blue is not a good color for dinnerware, however. Food looks less appetizing when it is served on blue plates, perhaps because very few foods in nature are of that color. Other studies have shown that the color green is calming. After London's Blackfriars Bridge was painted green, the number of suicides from it decreased by 34 percent. It is clear that color affects not just our moods, but our behavior as well. 1. Which paragraph has unity?