Directions: Read the passage carefully and identify the key structure.

There are trees round us. Unfortunately, there are people who carved their names or write anything on their trunk using knives or sharp tools. This is not good because they can harm trees. Diseases can attack the tree through cuts in the bark and this may cause the tree to die.

A. Cause and Effect
B. Comparison and Contrast
C. Description
D. Chronology ​