Which of the following is not a tool for tracing evolutionary relationships?

Excavation techniques are used to uncover and recover fossils from the ground, but they are not used to directly trace evolutionary relationships. Techniques such as DNA sequencing and relative dating, which allow scientists to determine the evolutionary relationships between different species, are ideal for studying evolutionary relationships.

Because it provides information about the genetic code of different species and allows scientists to determine how closely related they are to one another, DNA sequencing is a powerful tool for tracing evolutionary relationships.

Another tool used to trace evolutionary relationships is relative dating, which provides information about the relative age of different fossils and allows scientists to determine which species evolved first and which species evolved later.

"Natural selection" is not a tool for tracing evolutionary relationships, but it is a key mechanism that drives evolution and shapes the relationships between different species over time.