Final answer:
Coptic Christians are found primarily in Egypt, where the Coptic Church took hold by adopting Monophysite beliefs and later become more isolated following the Council of Chalcedon in 451.
Step-by-step explanation:
Coptic Christians are found primarily in Egypt. This Christian community adheres to traditions that date back to early Christian beliefs and practices. In Egypt, the Coptic Church flourished by adopting Monophysite Christianity, which had a strong presence along the Nile valley. Furthermore, the Christian church in Egypt followed a more independent path from the early Christian world after the Council of Chalcedon in 451 due to the Monophysite position being deemed heretical, thereby causing a schism and bolstering the uniqueness of the Coptic Church.