How do I go back to resizing with the Selection tool instead of moving?

Question

Adobe Illustrator

When activating the topmost tool, the "Selection" arrow, I could both move the object and resize it by stretching the corners. Then something happened and I can only move objects, resize doesn't work. How can I make resizing work again?

Answer 1

And I already took a screenshot for you, okay... I'll leave it here.