Word Play - Processual Archaeology

Processual archaeology is a term archaeologists use to describe an important theoretical advance for archaeological studies that arose during the 1960s and is still extremely influential today. So, which of the following really describes processual archaeology?

1. The study of the mechanical aspects and remains of human behavior.
2. The archaeological investigation of parades and related moving festivals.
3. An agreed-upon set of standard laboratory methods to analyze data.

And the real definition of processual archaeology is...