In developed countries,where children receive excellent nutrition and medical care,the average age of menarche has been falling steadily in what scientists describe as

Question

Quizplus · Accepted Answer

The phrase "secular trend" refers to a long-term and predictable shift in a population's characteristics, and in this case, it refers to the trend of decreasing age of menarche in developed countries, despite good nutrition and medical care for young girls. This answer best reflects the given information in the question. Options A, B, and C are not relevant to the topic of menarche and the factors affecting its age of onset.

In Developed Countries,where Children Receive Excellent Nutrition and Medical Care,the