Answer:
craving is the correct answer to the question i think
They can talk about what they like to do
Cell, Tissues, Organs, Organ Systems, Organism (Multicellular).
This is from the smallest component to largest components that make up a human organism.
7 days a week is recommended for any age to be hygienic but that's should you could never shower i guess i mean it's your choice but don't do that 6-7 is healthy or "normal"