Select the single word that best replaces the underlined phrase: "A specialist who draws and produces comprehensive maps of land surface features".

The correct answer is Topographer.

Explanation:

Let's analyze the given options to find the word that best replaces the phrase "A specialist who draws and produces comprehensive maps of land surface features":

1. Topographer: A specialist or expert who creates detailed maps representing the physical features, contours, and surface characteristics of a land area. This perfectly matches the underlined phrase.

2. Pharmacist: A health professional qualified to prepare and dispense medicinal drugs.

3. Archivist: A person responsible for preserving, organizing, and maintaining historical records and archives.

4. Sculptor: An artist who creates three-dimensional art objects by carving, modeling, or shaping materials like stone, wood, or clay.

Therefore, the term Topographer is the precise single-word substitution for the description provided.