Answer:
arrangement within the lesson
font size and color
the index
Explanation:
These are all ways in which we can identify the importance of ideas in a textbook. In a textbook, structure is very important. Looking at this can gives us some hints as to the best way to study several topics. For example, looking at the way ideas are places within the lesson and the index can indicate the hierarchy of ideas that the textbook follows. Another way to identify the relative importance of ideas is by focusing on the font size and color employed.
