A ventilation grate, some wires or cables, a piece of wood at an angle, and everything against a brick wall. The Tate website says that:
Abstract art is art that does not attempt to represent an accurate depiction of a visual reality but instead use shapes, colours, forms and gestural marks to achieve its effect.
Sliding sideways from art into photography, I guess we can use the same definitions more or less. And I guess the photo is abstract. You can’t see exactly what everything is. But you can maybe guess what things might be. Is it abstract?