Why did michelangelo sculpt the mother figure in his pieta as a young woman?

Mary, the mother in the painting, was depicted as a young woman to symbolize the purity of the soul.

The Pieta is a work of Renaissance mold by Michelangelo Buonarroti, housed in St. Peter's Basilica, Vatican City. It is the first of various works of a similar topic by the craftsman.

This renowned masterpiece portrays the body of Jesus on the lap of his mom Mary after the Crucifixion. The subject is of Northern beginning. Michelangelo's elucidation of the Pietà is phenomenal in Italian model. It is an imperative work as it adjusts the Renaissance beliefs of traditional magnificence with naturalism.