Paragraph SevenResearchers found that of all the forms of inactivity they examined, television-viewing was the worst. It was linked to significantly higher blood pressure in children — the more TV kids watched, the higher their blood pressure — and the effect held true regardless of whether a child was heavy or at a healthy weight.The c_____ between TV watching and high blood pressure in children.
【正确答案】：correlation
【题目解析】：本段讲的是看电视与孩子血压之间的关联。