You are an epidemiologist studying the effects of years of vigorous exercise on health. you ask participants to recall how much they have exercised per week every week for the last three years. what type of study are you conducting?

answer:

your answer is retrospective

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.

no because dogs are cats the product you bought is meant for cats xd