How can I merge two objects completely? This is only my second sculpture in Blender, so I'm completely a beginner, and I made the body and the head from different objects, because I had to move the head, but now I would like to manipulate them together. What could I do?

Here is a picture of the sculpture:



Join doesn't work, because it's true that they can be moved as one object this way, but they are still two different objects and they aren't merged. I don't want that line between them.

Is there any solution for this problem?

Thank you in advance.
Try using a boolean modifier with Union.