Answer:
1) Different types of tissue working together to perform a specific job for your body. Organ
2) Organs systems working together. Organism
3) Similar cells working together , such as many muscle cells working together. Tissues
4) The basic unit of an organism. Cell
Step-by-step explanation:
According to the cell theory, cell is the basic unit of an organism.
The level of organization start with atoms, molecules inside a cell. Cells which work together form tissues. Different types of tissues working together form an organ. Different organs work together to form organ systems. The organ systems work together to make up a complete organism.