Answer:
D. draw the reader's attention to the materials needed
Step-by-step explanation:
Looking at the numerical from the excerpt, one will discover that it was included in order to draw the reader's attention to the materials needed.
The numerical list actually describe the measurements of the materials to be used in the construction of the beehive. The reader will be able to understand the sizes of the materials needed for the construction of the Langstroth Beehive. Such numerical list actually draws the reader's attention.