C. The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.
Explanation:
As we know that while the person is doing exercise the weight is hold by the ankles as it is placed there.
Now the lower legs are bend while doing the exercise so we can say that lower legs are acting like lever which can rotate about one end and at the other end it is holding the weight
Now the knees are acting like fulcrum here because they are supporting the lower legs in such a way that they can rotate about its one end connected to knees
so correct answer will be
C. The lower legs are levers, and the knees are fulcrums. The ankles hold the loads.
Weight doesn't really mean much as it just means gravity the bigger a space object is the more force it has to pull on something since the moon is smaller than the earth then it has less gravity and then less weight on scales.
