The story of Adam and Eve in the book of Genesis is understood as the origin of humanity. While some interpret this story literally, others view it symbolically. Regardless, Pentecostals generally believe that all human beings are descendants of Adam and Eve.
Regarding the diversity of ethnic groups and races, Pentecostals typically attribute this to various factors such as migration, adaptation to different environments, and genetic variation over time. They see this diversity as part of God's creative design and plan for humanity. So, while Adam and Eve may be seen as the original human beings, the diversity of ethnic groups and races is understood within the broader framework of God's providence and human history.