Which feature in a textbook can you read and study the material

The feature in a textbook that can help me read and study the material is a:

Conceptual map.

Explanation:

There are many features from textbooks that can help us study them and learn. However, Concept Maps help us to identify the main concepts of the topic and create a cognitive map to remember them, their meanings, and relationships. First of all, is like organizing the information in a scheme without all the words. To enhance the whole topic to deepen in each topic after having understood the topic as a whole.

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.

i   believe   the   answer   is   d