What is the primary role of the chalaza, the protein structure connected to the yolk in an egg?

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Maintain the yolk in the center of the eggDarken the color of the yolkAssist the egg in hatching smoothlyProvide nourishment to the developing embryoNone of the above

Explanation

The chalaza functions to keep the yolk suspended in the middle of the egg, ensuring stability. It does not influence yolk color, assist hatching, or directly supply nutrients to the embryo.