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i think it may be A, but I'm not sure :/
Because it goes through all level of which the suns energy is consumed
Answer:
answer of your question ☝️☝️☝️
The pit that marks the location of the umbilical cord after birth is known as the navel or belly button. All animals that grow placenta during fetal development will have a navel or belly button. The scientific name of the structure is the umbillicus. It can be a depression in some individuals or raised in others.