How to follow object after object in only one axis?

Question

C++ / C#

Good evening. I need to fix go for go on one axis only.
so that he runs like a string after me in a straight line

Answer 1

it is possible like this:

Vector3  position = new Vector3(go1.transform.position.x, go2.transform.position.y, go2.transform.position.z);
go2.transform.position = position;

where:
go1 - main GO
go2 - "child" GO