Which evidence is often analyzed in forensic science?

Forensic science encompasses a wide array of disciplines and types of evidence analysis. The correct answer highlights that chemical substances, fingerprints, and DNA are all critical types of evidence frequently examined in forensic investigations.

Chemical substances can include drugs, toxins, or other materials that can provide insight into a crime scene or indicate the presence of illegal activities. Fingerprints, being unique to each individual, play a crucial role in identifying suspects and linking them to crime scenes. DNA evidence has become one of the most significant advancements in forensic science, allowing for precise identification of individuals based on their genetic material, which can be gathered from various sources like hair, blood, or other bodily fluids, often found at crime scenes.

The other options limit the scope of forensic evidence too narrowly. Biological samples alone do not account for the broad range of evidence analyzed, such as chemical or physical traces from a crime. Focusing only on firearms excludes a vast array of evidence types that are critical to investigations. Digital data analysis is increasingly important in forensic investigations, especially with the rise of technology, yet it is still just one facet of the multifaceted nature of forensic science. Thus, the answer recognizes the diversity and complexity of evidence types that forensic science encompasses.