Answer:
longitudinal
Explanation:
According to my research on different types of research strategies, I can say that based on the information provided within the question Dr. Martin used a longitudinal approach. This strategy focuses on repeatedly observing a specific aspect or variable over a short or long period of time in different intervals. Which is what Dr. Martin is doing by testing the same group of children with the same test 2 years apart.
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Girls aged 9-13 should be eating about 5 ounces of grain per day.
humans think they are the superior race only because we have more technologies than other living life on earth. obviously if a human was lock in a cage with a tiger, the tiger would win. but now we have machinery that can manufacture weapons, bombs and tbh anything else. we have revolved 6 times from, Australopithecus Afarensis, homo habilits, homo erectus, homo neanderthalensis and Homo sapiens
