Answer:
Tissue = Bone Marrow
Organ System = Skeletal System
Organ = Bones
Explanation:
Tissue is something that can be combined to make a part of an organism that is larger, stronger, and more useful called an Organ.
An organ is something that can also be combined with other organs to create organ systems.
And as you guessed, organ systems can be combined to make organisms. The last remaining choice in the image you attached, the human body, is an organism.
If you're looking for the levels of organization here they are:
Cell > Tissue > Organ > Organ System > Organism
