To answer this question, you need to understand the concept of paleontology.
Option A) Study of prehistoric life or fossils - This option is correct because paleontology is indeed the study of prehistoric life or fossils. Paleontologists analyze fossil remains to understand the history of life on Earth.
Option B) Collarbone - This option is incorrect. The term for collarbone is clavicle, not paleontology.
Option C) (Of a style of art) showing things as they actually appear in real life - This option is incorrect. The term for this type of art style is realism, not paleontology.
Option D) Ointment - This option is incorrect. The term for ointment is not related to paleontology.
The correct answer is A) Study of prehistoric life or fossils. This option is correct because it accurately describes the field of paleontology.