Final answer:
The sacrament used in the Native American Church of the US that incorporates aspects of Christianity is the Eucharist, also known as Communion.
Step-by-step explanation:
The Native American Church of the US incorporates aspects of Christianity and uses the sacrament of the Eucharist, also known as Communion. In this sacrament, Christians eat bread and drink wine to remember Christ's sacrifice for humankind. While Catholics and Eastern Orthodox believe in the literal transformation of the bread and wine into the body and blood of Christ, Protestants and other Christians view it as a symbolic reminder and re-enactment of Christ's sacrifice.