The part of the tooth that contains blood vessels and nerve fibres is

Explanation

The question is asking about a specific part of a tooth. The options are Root, Enamel, Dentine, and Pulp cavity. To answer the question, we need to understand the structure of a tooth. A tooth has three main parts: the crown, neck, and root. The crown is the visible part of the tooth that is covered by enamel, which is a hard, protective layer. The neck is the part of the tooth that connects the crown to the root. The root is the part of the tooth that is embedded in the jawbone and is not visible. The part of the tooth that contains blood vessels and nerve fibres is called the pulp cavity. The pulp cavity is located in the centre of the tooth and extends from the crown to the tip of the root. The pulp cavity contains blood vessels and nerve fibres that supply nutrients and sensation to the tooth. Therefore, the correct option in this question is option D, Pulp cavity. It is important to understand the different parts of a tooth and their functions in order to maintain good oral hygiene and prevent dental problems.