Explanation:

- The given group of words is about the science and art of growing vegetables, fruits, and flowers.

- Option 1: Herpetology

- This is the branch of zoology that deals with the study of reptiles and amphibians.

- Option 2: Horticulture

- This refers to the science and art of growing and cultivating fruits, vegetables, flowers, and ornamental plants.

- Correct and relevant

- Option 3: Haplology

- This is a linguistic term that refers to the omission of one of two identical or similar syllables in a word, such as saying "probly" instead of "probably."

- Option 4: Herbing

- This term is not a scientifically recognized field related to growing plants; it may casually refer to working with herbs.