How can you help a dying mollie with young?

To help a dying mollie with young, first ensure that the water quality in the tank is optimal; test for ammonia, nitrites, nitrates, and pH levels. Perform a partial water change if necessary and add a water conditioner to remove toxins. Provide a stress-free environment by minimizing disturbances and offering a hiding spot for the mother and her fry. Additionally, consider separating the mother from other fish if she is struggling, to reduce stress and allow her to focus on recovery.