Based on the symptoms, the most likely cause of the problem is formaldehyde used in the building materials.
Formaldehyde is a chemical substance which is used as. preservative of wood and building materials.
It us also present in binders and adhesives.
Exposure to formaldehyde produces adverse effects such as;
Therefore, based on the symptoms, the most likely cause of the problem is formaldehyde used in the building materials.
Learn more about formaldehyde at: https://brainly.com/question/14798580