You have a friend who has very little exposure to the sun and she consumes very few calcium-rich foods. in addition, she has a 2 year old child and 3 month old twins. your friend is at very high risk for developing:

like this.

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so we know the answer cannot be c because no insect or animal starts as an adult

the answer is a. a swimming larvae

because since they are sea animals they automatticaly have to know how to swim they cannot just sink to the bottom

sorry if this is the incorrect answer.