Answer:
A. cell-tissue-organ-organ system-organism
Step-by-step explanation:
This is the correct order of increasing complexity in the organization of the human body.
Cells are the basic building blocks of life, tissues are made up of groups of similar cells that work together to perform a specific function, organs are made up of different types of tissues that work together to perform a specific function, organ systems are groups of organs that work together to perform a specific function, and finally, the organism is the entire living being made up of all the organ systems.
I hope this helped :)