Final answer:
The words in boldface type within the given text are key terms, with definitions for these terms provided in the margins. This educational approach emphasizes important vocabulary and facilitates learning by allowing quick access to definitions and encouraging further exploration of the terms.
Step-by-step explanation:
In the given text, the words in boldface type are key terms that are important to understanding the content of the text. The definitions provided in the margins serve to elucidate these key terms for better comprehension. Typically, this format is used in textbooks or educational materials to emphasize important vocabulary and concepts, making it easier for students to identify and learn essential information.
As per the reference information provided, it's clear that these boldface words are meant to draw the reader's attention to terms that are crucial to grasp the subject matter being presented. The associated margin definitions allow the reader to quickly access the meaning of these terms without needing to consult a separate glossary or dictionary, though a comprehensive glossary is often provided at the end of the chapter or the book for further reference.
Additionally, the use of hyperlinks to Wikipedia or Wiktionary for certain terms suggests that the student is encouraged to explore these concepts in more depth. This blended method of learning, which combines in-text definitions with opportunities for external research, is designed to enhance the educational experience and facilitate a better understanding of the subject matter.