Based on the description above, Wendy has employed in the method for controlling extraneous variable in her study with the use of comparing homogeneous subgroups by which she decides on investigating only the children who has the average height and weight, and also with no heart conditions and history of obesity in her study.
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it id defintly a or c but i think it is a
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Trade can make everyone better off. Markets are usually a good way to organize economic activity. Governments can sometimes improve market outcomes. A country's standard of living depends on its ability to produce goods and services
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hope this helps
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in my opinion i think it's the mass however it could also be the weight or speed or even the distance
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Hope it helped!
Yes because they invaded other European colonies, and it would help if you had said what year.