Which type of feature of earth’s crust does the diagram show? a. syncline b. reverse fault c. anticline d. normal fault

the correct answer is option a, that is, syncline.  

a syncline in a structural geology refers to a fold with younger layers nearer to the midpoint of the structure. these are generally a downward fold (synform), known as a synformal syncline.  

the synclines on a geologic map, are identified as an arrangement of rock layers, with the youngest at the center of the fold or hinge and with a reverse alignment of the same layers of rock on the contrary side of the hinge.