Object Responsibilities

Question

OOP

Hello habravians. I still can’t find an exhaustive answer to the question: “the main obligations of the object, contractual obligations”. Prompt literature / site where exactly there is an answer to this question. I did not find Budd in Grady Booch and Timothy.
Thank you!

Answer 1

and where, in fact, is the question to which you cannot find the answer?

Answer 2

Probably from this page en.wikipedia.org/wiki/SOLID_ (object-oriented_programming) and links.