Your question is perfectly reasonable and not in the least offensive.
During the Eucharistic Prayer, during Mass, the bread and wine are consecrated, and by the power of the Holy Spirit through the action of the priest, the bread and wine cease to exist and become the Body and Blood of Christ, under the appearance of bread and wine.
As long as the elements of the Eucharist remain recognizable in their appearances, the Real Presence of the Body and Blood of Christ remain.
Hope that helps.
sitetest
Yes.
I just do not understand why this “person” is going on and on about it.