Not selectable objects

[Saru]

Hello everyone! I did a quick search in past discussions, but I can't find any suggestions.
I reopened an old file to edit an object.. and I can't select it... I don't understand why! Help...maybe it's a nonsense I don't remember doing.
It is not a group, it is not blocked,... it was created by me with modeling.
give me tips on what I can control to unlock it! !

Thank you.

 

[Saru]

I humbly ask forgiveness....but I hope my moment of panic can be useful to someone since I found the solution. . .
simply simply
I didn't remember making design variants. .

Good job!