Who found ideas for her dances in natural phenomena such as the movement of wind and waves, and drew upon ordinary actions such as walking, running, skipping and jumping: the normal 'movement repertory' of human beings

A. Isadora Duncan  

Explanation:

Isadora Duncan is one of the most famous figures of modern dance. She developed the dance that she found to be "free" and "natural", in sync with the movements that can be found in nature - trees, wind, waves.

She drew inspiration from folk dances and found ballet to be against nature, too strict and not fit for the nature of the human movements.

She introduced everyday actions into her form of dance, like skipping, jumping, walking and running.  

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