Unit 4: Adolescence and Adulthood

Answer: C — The correct answer, C, is due to the natural process of aging, where muscle mass and strength gradually decline after reaching a peak in young adulthood. Option A is incorrect because bone density actually decreases with age, especially in women. Option B is incorrect because while poor diet can contribute to declining cardiovascular health, it is not the primary reason for the decline in physical abilities. Option D is incorrect because flexibility and balance do not necessarily improve with age, and may also decline.

Answer: D — Emily is most likely in early adulthood because this stage, which typically occurs from the late teens to the late 20s, is characterized by physical strength peaking and then gradually declining. Emerging adulthood (A) refers to the stage from late teens to early twenties, young adulthood (B) is not a commonly used term in this context, and middle adulthood (C) typically occurs from the 40s to the 60s.

Answer: B — The correct answer is B because during young adulthood, physical strength and flexibility typically peak and then gradually decline. This decline can start as early as the mid-20s. Option A is incorrect because middle adulthood typically begins around age 40, and Emily is only 25. Option C is incorrect because while a sedentary lifestyle can contribute to a decline in physical strength and flexibility, it is not the only explanation for Emily's experiences. Option D is incorrect because while a medical condition could be a possible cause of Emily's symptoms, the question suggests that her experiences are a natural part of physical development during young adulthood.

Answer: C — C is correct because during young adulthood, people typically experience a gradual decline in physical strength and flexibility. This is a natural part of the aging process. A is incorrect because a midlife crisis is a psychological phenomenon that occurs later in life, typically around age 40. B is incorrect because there is no indication that Emily has a chronic illness. D is incorrect because while a poor diet and lack of exercise can contribute to physical decline, they are not the most likely explanation for Emily's experiences given her age.

Answer: A — The correct answer is A) postformal thought because Maria is applying logical reasoning to a complex, real-world problem, which is a hallmark of postformal thought. Postformal thought involves the ability to think critically and creatively, and to apply theoretical knowledge to practical problems. Options B and C are incorrect because preoperational and concrete operational thought are stages of cognitive development that occur earlier in life. Option D is incorrect because formal operational thought, while involving abstract reasoning, does not necessarily involve applying that reasoning to real-world problems.