Sentence:  Which is the most demanding? I think that my <WSD>practice</WSD> as an artist is 'stronger' because it is the <WSD>practice</WSD> that best fuels and balances myself and that generates new knowledge for my other work as both arts educator and creative arts therapist. 
Meaning of the word marked with <WSD> tags:  The ongoing pursuit of a craft or profession, particularly in medicine or the fine arts.