question: up and down:front and rear
choices.label: A B C D
choices.text: presence or absence:dawn and twilight left and right:east and west more and less:pros and cons similarities and differences:life and death
explanation: both "up and down" and "front and rear" belong to positional words, as well as left and right, "up" and "down" have opposite meanings, and "front" and "rear" have opposite meanings. "dawn" and "twilight" describe morning and evening, not positional words, "presence" and "absence" indicate whether something exists, "presence" and "absence" are completely complementary. "left and right" and "east and west" are both locative words. "left" and "right" have opposite meanings, and "east" and "west" have opposite meanings. "more and less" describe different degrees of quantity, "more" and "less" have opposite meanings, and "pros" and "cons" describe whether the direction is the same. "similarities" and "differences" describe whether things are different. "similarities" and "differences" are completely complementary, "life" and "death" describe whether or not living things have life, and "life" and "death" are completely complementary.