Answer:
The correct answer is - option A.
Step-by-step explanation:
Celeste wrote only six levels of organization in her notes that include molecules, cells, tissue, organ, and organ system. That is the correct sequence from smaller to larger but she forgot the sixth and a higher level of the body system of the organization.
This level is the organism which includes the organ system. Organ system comprises various organ those perform different action to perform a larger level function.