Correct Answer: A

Rationale: The information-processing perspective focuses on how individuals process, store, and retrieve information. Choice A, 'examines separate aspects of thinking,' accurately reflects this perspective. The other choices are incorrect. Choice B is incorrect because the information-processing perspective does consider biological influences on cognitive development. Choice C is incorrect as this perspective is not limited to children in cultures with formal schooling. Choice D is incorrect as the information-processing perspective does not focus on overall cognitive change, but rather on the specific processes involved in information processing.

Correct Answer: C

Rationale: Free radicals may contribute to oxidative stress, increasing the risk of conditions associated with a high-fat diet. When consuming a high-fat diet, the body may produce more free radicals, leading to oxidative damage. Sex hormones, over-the-counter medications, and low body weight do not directly heighten the effects of a high-fat diet like free radicals do.

Correct Answer: C

Rationale: Reduced sleep is the correct answer as it affects hormones that regulate hunger and metabolism, leading to increased appetite and weight gain. Self-regulation is not directly related to the brain's regulation of hunger and metabolism. Frequent eating out may impact food choices and portion sizes but is not specifically linked to disrupting the brain's regulation. Using screen media can affect sleep patterns but is not as directly related to the brain's regulation of hunger and metabolism as reduced sleep.

Correct Answer: D

Rationale: The United States is the correct answer as it ranks poorly in measures of children's health and well-being compared to other developed nations. According to the extract provided, the United States does not perform well in this aspect. Choices A, B, and C are incorrect as there is no information provided suggesting that Sweden, Spain, or Australia do not rank well on key measures of children's health and well-being.

Correct Answer: A

Rationale: Brain growth is especially dramatic during the first year of life when the brain more than doubles in size. This period is characterized by rapid neural development and growth. The brain doesn't double in size during the second year, making choice B incorrect. Middle childhood and adolescence do not represent periods where the brain more than doubles in size, making choices C and D incorrect, respectively.