Which technique analyzes DNA from body tissues or fluids to identify individuals?

The technique that analyzes DNA from body tissues or fluids to identify individuals is DNA profiling, which is sometimes referred to as DNA fingerprinting. This method involves extracting and analyzing specific regions of an individual's DNA that vary between people, allowing for unique identification. It is commonly used in forensic science, paternity testing, and genetic studies.

DNA profiling relies on the principle that while most of the DNA sequence is the same among individuals, certain sequences are highly variable and can serve as markers for identification. These markers are often short tandem repeats (STRs) that are amplified and compared across samples.

In contrast, DNA synthesis focuses on the creation of new DNA strands, while DNA extraction is the process of isolating DNA from cells or tissues, but neither of these techniques is primarily concerned with identifying individuals. Therefore, the choice related to analyzing and identifying individuals based on their unique DNA characteristics is accurately represented by DNA profiling (or DNA fingerprinting).