What are fossils? How are they formed? Describe in brief two methods of determining the age of fossils. State any one role of fossils in the study of the process of evolution.

Explanation

### Step-by-Step Solution

**1. Definition of Fossils:**
Fossils are the preserved remains or traces of organisms that lived in the past. They can include bones, shells, imprints, or even traces of activities like footprints.

**2. Formation of Fossils:**
Fossils are formed through a process called fossilization. This typically occurs when an organism dies and is quickly buried by sediment. Over time, the sediment hardens into rock, and the organic material is replaced by minerals, preserving the shape and structure of the organism.

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