What makes each artwork unique from each other ?

it is They express who they are, what they feel, what are their thoughts, their personalities, their views about their surroundings, in the form of art they are making. They make their artworks their world, and that's what makes an artwork unique.

Explanation:

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Because it will reveal whoever they are and they have time to express their feelings o. this one but simple piece of artwork. It doesn't matter how complicated or simple it is. From drawing a stick figure to drawing realistic eyes. It expresses who they are.

answer; gender and sexuality;

the sculpture i am pretty sure you are talking about is the statue b. the david statue now lives in the galleria dell'accademia, florence, italy. it was made by ‎michelangelo.