Opening from nose to throat is closed by:

Explanation

The soft palate is a muscular structure that is located at the back of the roof of the mouth, or the hard palate. It is made up of muscle fibers, connective tissue, and glandular tissue, and it plays an important role in speech, swallowing, and breathing. The soft palate is connected to the hard palate at the front and to the uvula at the back, and it helps to separate the oral cavity from the nasal cavity. During swallowing, the soft palate and uvula move upward and backward to close off the nasopharynx, which is the opening from the nose to the pharynx. This helps to prevent food and liquids from entering the nasal cavity and instead directs them towards the esophagus. The muscles of the pharynx also contract to help push food and liquids down into the esophagus and prevent them from entering the airway.