Under the IS A RELATIONSHIP subcategory, the explanation given is, " Wherever we come across an IS A relationship between objects, we can use inheritance." I think it should have said, “between classes” not objects.
Course: https://www.educative.io/collection/10370001/6201068373409792
Lesson: https://www.educative.io/collection/page/10370001/6201068373409792/6489377230290944