Question

in this text, rachel m. barker discusses different types of rocks. geology is the study of rocks and other material that make up the earths surface.
question 25
which best describes the overall structure of the article?
a. it discusses rock types from most common to least common.
b. it discusses rock types from most valuable to least valuable.
c. it focuses on the importance of pressure in rock formation.
d. it describes the ways in which different types of rocks are formed.

Explanation:

The text states Rachel M. Barker discusses different types of rocks. Option A says the article discusses rock types from most common to least common. Since the text is about different rock types, organizing by commonality (most to least) is a logical structure for such a discussion. Option B is about value, which isn't mentioned. Option C focuses on pressure in rock formation, not stated. Option D is about formation ways, not the main structure here. So A is the best fit.

Answer:

A. It discusses rock types from most common to least common.