Final answer:
The subject of this question is Biology. Paleontologists study fossils of plants and animals to understand life in the past and how it has evolved over time.
Step-by-step explanation:
The subject of this question is Biology. In Biology, paleontologists study fossils of plants and animals to understand life in the past and how it has evolved over time. Fossils are the preserved remains of organisms from the distant past, such as bones, teeth, and impressions. By studying fossils, paleontologists can determine the features of extinct species and compare species from different periods in history to understand evolution.