Wendy is investigating differences in cardiovascular health between children who are involved in extra-curricular activities and those who are not. she decides to investigate only children who are average height and weight, with no existing heart conditions and no family history of obesity. wendy has employed which method for controlling the extraneous variable in her study?

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.

- "sack of constantinople, (april 1204). the diversion of the fourth crusade from the holy land to attack, capture, and pillage the byzantine city of constantinople divided and dissipated the efforts of the christians to maintain the war against the muslims. the fourth crusade was corrupted from its purpose early on."

- "the crusades were a series of religious wars undertaken by the latin church. the first crusade arose after a call to arms in 1095 sermons by pope urban ii. the first crusade unleashed a wave of impassioned, pious catholic fury, which was of constantinople, the capital of the christian-controlled byzantine empire."

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