**Explanation:**

The correct answer is option 'D' - All of the above.

Here is the detailed explanation for each word:

**a) Beautifying:**
Beautifying refers to the act of making something beautiful or enhancing its aesthetic appeal. It involves adding decorative elements, colors, or patterns to improve the visual attractiveness of an object or space. Beautifying is often associated with enhancing the appearance and making things more visually pleasing.

**b) Adornment:**
Adornment refers to the act of decorating or embellishing something. It involves adding decorative elements or accessories to enhance the appearance of an object or person. Adornment can include various forms of decoration such as jewelry, clothing accessories, or even decorative items in a room.

**c) Ornamentation:**
Ornamentation refers to the process of adding decorative elements or ornaments to enhance the beauty or visual appeal of something. It involves the use of decorative patterns, motifs, or designs to embellish an object or space. Ornamentation can be seen in various forms of art, architecture, furniture, and clothing.

All of the above words - beautifying, adornment, and ornamentation - are synonyms that convey the same meaning of adding decorative elements to enhance the visual appeal of something. They are all used to describe the process of decoration and making things more attractive.

Therefore, option 'D' - All of the above - is the correct answer as it includes all the synonyms for decoration - beautifying, adornment, and ornamentation.